Answer: Option B. -> Istanbul
Answer: (b)

Answer: Option A. -> Potomac
Answer: (a)
Washington, D.C., formally the District of Columbia and commonly referred to as Washington, “the District”, or simply D.C. is the capital of the United States. The Potomac River forms the District’s border with Virginia and has two major tributaries: the Anacostia River and Rock Creek.
The highest natural elevation in the District is 409 feet (125 m) above sea level at Fort Reno Park in upper northwest Washington. The lowest point is sea level at the Potomac River.

Answer: Option D. -> Tiber
Answer: (d)
Rome is the capital of Italy, located in the central-western portion of the Italian Peninsula, on the Tiber River within the Lazio region of Italy.
The Tiber is the third-longest river in Italy. It rises at Mount Fumaiolo in central Italy and flows in a generally southerly direction past Perugia and Rome to meet the sea at Ostia.

Answer: Option A. -> South America
Answer: (a)
The wettest continent, with plenty of rainforests in South America. The driest continent is clearly Australia, with a Bowen ratio of about 2, followed by Africa, which contains the Sahara and Kalahari deserts.
The wettest continents are South America and Europe with a Bowen ratio of about 0.6. North America is also a relatively wet continent with a Bowen ratio significantly less than 1.0.

Answer: Option C. -> Maldives
Answer: (c)

Answer: Option B. -> 3 4 1 2
Answer: (b)

Answer: Option B. -> Italy
Answer: (b)

Answer: Option D. -> 1, 2 and 3
Answer: (d)

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

Answer: Option B. -> Nicaragua - Balmopan
Answer: (b)