Answer: Option C. -> 1 and 2 only
:
C
Explanation:
Statement 1 is correct: The Moist deciduous forests are more pronounced in the regions which record rainfall between 100-200 cm. Teak, sal, shisham, hurra, mahua, amla, semul, kusum, and sandalwood etc. are the main species of these forests.These forests are found in the northeastern states along the foothills of Himalayas, eastern slopes of the Western Ghats and Odisha.
Statement 2 is correct: Dry deciduous forest covers vast areas of the country, where rainfall ranges between 70 -100 cm. These forests are found in rainier areas of the Peninsula and the plains of Uttar Pradesh and Bihar.
Statement 3 is incorrect: Tendu, palas, amaltas, bel, khair, axlewood, etc. are the common trees of Dry deciduous forest.

Answer: Option C. -> Both 1 and 2
:
C
Explanation:
Statement 1 is correct: Arunachal Himalayas extend from the east of the Bhutan Himalayas up to the Diphu pass in the east. Their orientation is from the southwest to the northeast direction, unlike the earlier ranges of the Himalayas.
Statement 2 is correct: These ranges are dissected by fast-flowing rivers from the north to the south, forming deep gorges. Bramaputra flows through a deep gorge after crossing Namcha Barwa. Some important rivers crossing these ranges include - Kameng, Subansiri, Dihang, Dibang, Lohit etc.

Answer: Option C. -> 1 and 3 only
:
C
Explanation:
Statement 1 is correct: As compared to the western coastal plain, the eastern coastal plain is broader and is an example of an emergent coast. Because of its emergent nature, it has less number of ports and harbours.
Statement 2 is incorrect: The western coastal plains are an example of submerged coastal plains. Submergent coasts are characterised by estuaries and deep natural ports. Because of the submergence the western coast has a narrow belt and provides natural conditions for the development of ports and harbours.
Statement 3 is correct: Eastern coastal plains have well developed deltas. The deltas are formed by the rivers flowing eastward into the Bay of Bengal. These include the deltas of the Mahanadi, the Godavari, the Krishna and the Kaveri.

Answer: Option A. -> Western Ghats
:
A
Explanation:
Western Ghats are locally known by different names such as Sahyadri in Maharashtra, Nilgiri hills in Karnataka and Tamil Nadu and Anaimalai hills and Cardamom hills in Kerala. Western Ghats are comparatively higher in elevation and more continuous than the Eastern Ghats.

Answer: Option A. -> Malabar Coast
:
A
Explanation:
The Malabar coast has got certain distinguishing features in the form of ‘Kayals’ (backwaters), which are used for fishing, inland navigation and also serves as a special attraction for tourists. Every year the famous Nehru Trophy Vallamkali (boat race) is held in Punnamada Kayal in Kerala.

Answer: Option B. -> Coromandel Coast
:
B
Explanation:
In the Coromandel Coast, which includes Coastal Tamil Nadu and adjoining areas of Andhra Pradesh, we find ‘As’ type of climate as per Koeppen’s classification, which is a Monsoon type with dry season in summer.

Answer: Option B. -> Force exerted by the north-eastward movement of the Indian plate at the time of the Himalayan origin.
:
B
Explanation:
The Northeastern Plateau is an extension of the main Peninsular plateau. It is believed that due to the force exerted by the northeastward movement of the Indian plate at the time of the Himalayan origin, a huge fault was created between the Rajmahal hills and the Meghalaya plateau. Later, this depression got filled up by the deposition activity of the numerous rivers. Today, the Meghalaya and Karbi Anglong plateau stand detached from the main Peninsular Block.

Answer: Option C. -> Both 1 and 2
:
C
Explanation:
The Tamil Nadu coast remains dry during the south-west monsoon season. There are two factors responsible for it:
Statement 1 is correct: The Tamil Nadu coast is situated parallel to the Bay of Bengal branch of the south-west monsoon.
Statement 2 is correct: Tamil Nadu lies in the rain shadow area of the Arabian Sea branch of the south-west monsoon.

Answer: Option D. -> 1, 2 and 3
:
D
Explanation:
Statement 1 is correct: The Kosi is an antecedent river with its source to the north of Mount Everest in Tibet, where its main stream Arun rises. After crossing the Central Himalayas in Nepal, it is joined by the Son Kosi from the West and the Tamur Kosi from the east.It forms Sapta Kosi after uniting with the river Arun.
Statement 2 is correct: The Son is a major right bank tributary of the Ganga River. It is a large south bank tributary of the Ganga, originating in the Amarkantak plateau.
Statement 3 is correct: The Gandak comprises two streams, namely Kaligandaki and Trishul Ganga. It rises in the Nepal Himalayas between the Dhaulagiri and Mount Everest and drains the central part of Nepal. It enters the Ganga plain in Champaran district of Bihar and joins the Ganga at Sonpur near Patna.

Answer: Option B. -> 1, 4, 3, 2
:
B
Explanation:
Brahmputra has its origin in the Chemayungdung glacier of the Kailash range near the Mansarovar lake. From here, it traverses eastward longitudinally for a distance of nearly 1,200 km in a dry and flat region of southern Tibet, where it is known as the Tsangpo.
The river emerges from the foothills under the name of Siang or Dihang. It enters India west of Sadiya town in Arunachal Pradesh. Flowing southwest, it receives its main left bank tributaries, viz., Dibang or Sikang and Lohit; thereafter, it is known as the Brahmaputra.
The Brahmaputra enters into Bangladesh near Dhubri and flows southward. In Bangladesh, the Tista joins it on its right bank from where the river is known as the Jamuna. It finally merges with the river Padma, which falls in the Bay of Bengal.