South Arcot and Ramanathapuram receive over 50 percent of their annual rainfall from which one of the following?

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Q: 39 (CDS-II/2018)
South Arcot and Ramanathapuram receive over 50 percent of their annual rainfall from which one of the following?

question_subject: 

Geography

question_exam: 

CDS-II

stats: 

0,64,33,18,64,9,6

keywords: 

{'summer monsoon': [1, 0, 0, 1], 'west monsoon': [1, 0, 1, 0], 'east monsoon': [0, 0, 0, 1], 'ramanathapuram': [1, 0, 0, 1], 'annual rainfall': [1, 0, 0, 2], 'south arcot': [0, 0, 0, 1], 'western disturbances': [0, 0, 0, 1], 'bengal branch': [0, 0, 0, 1], 'south': [15, 1, 23, 37]}

The correct answer is option 2: North-east monsoon.

The annual rainfall received in South Arcot and Ramanathapuram is influenced mainly by the North-east monsoon. The North-east monsoon, also known as the winter monsoon, occurs from October to December in these regions. During this time, the monsoon winds blow from the north-east direction towards the Indian subcontinent, bringing moisture and rainfall from the Bay of Bengal.

Option 1, South-west monsoon, is not the primary source of rainfall for South Arcot and Ramanathapuram. The South-west monsoon occurs from June to September and affects mainly the western and northern parts of India.

Option 3, Bay of Bengal branch of summer monsoon, is incorrect as well. The summer monsoon primarily affects the southern and central parts of India, but it is not the main source of rainfall for South Arcot and Ramanathapuram.

Option 4, Western disturbances, refers to weather systems that bring rainfall to parts of North India during winter. This is not the primary source of rainfall for South Arcot and Ramanathapuram.

Therefore, the correct answer is option 2: North-east monsoon.