Answer: Option A. -> Only 1
Answer: (a)

Answer: Option A. -> Gulf of Mannar
Answer: (a)
Sethusamudram is the sea that separates Tamil Nadu, India, from Sri Lanka. It encompasses the Gulf of Mannar, the Palk Strait, and a shoal of islands and bays that separate them called Ram Setu ("Rama Bridge", also known as Adam’s Bridge).
Sethusamudram was the site of the proposed Sethusamudram Shipping Canal Project by the Government of India for dredging the entire straits to make it navigable by large ships and create fishing and shipping harbours in the coastal areas.
Advantages of this project derive from obtaining a navigable sea route close to the coast, reducing in travel distance between the western and eastern coasts of peninsular India by about 350 nautical miles (due to having to circle about the island of Sri Lanka).

Answer: Option B. -> Roha – Mangalore
Answer: (b)Konkan Railway is a railway line which runs along the Konkan coast of India. It was constructed and is operated by the Konkan Railway Corporation. It runs from Mangalore in Karnataka to Roha in Maharashtra through Goa, along the west coast of India and Western Ghats.

Answer: Option A. -> Siliguri and Darjeeling
Answer: (a)

Answer: Option A. -> Allahabad
Answer: (a)

Answer: Option B. -> Its total length is 5,846 km
Answer: (b)

Answer: Option A. -> Kolkata
Answer: (a)The term inland port is used in two different but related ways to mean either a port on an inland waterway or an inland site carrying out some functions of a seaport. By this standard, Kolkata is an inland river port.

Answer: Option C. -> Nhava Sheva (Jawaharlal Nehru Port)
Answer: (c)

Answer: Option A. -> Chennai
Answer: (a)

Answer: Option C. -> 1, 2, 3 and 4
Answer: (c)