South Arcot and Ramanathapuram receive over 50 percent of their annual

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

South-west monsoon
North-east monsoon
Bay of Bengal branch of summer monsoon
Western disturbances
This question was previously asked in
UPSC CDS-2 – 2018
The correct answer is B) North-east monsoon.
South Arcot (now Viluppuram and Cuddalore districts) and Ramanathapuram are districts in Tamil Nadu, located on the southeast coast of India (Coromandel Coast). This region receives the bulk of its annual rainfall, often over 50 percent, during the North-East monsoon season, which typically runs from October to December. During this period, the retreating monsoon winds, after crossing the Bay of Bengal, pick up moisture and bring rainfall to the eastern coast of South India.
During the South-West monsoon season (June-September), the Coromandel Coast lies in the rain shadow region of the Western Ghats, receiving comparatively less rainfall. Western Disturbances primarily affect the northern parts of India during the winter months, bringing rainfall or snowfall. The Bay of Bengal branch of the summer monsoon (South-West monsoon) brings rain to eastern and northeastern India and also contributes to rainfall in parts of the peninsula, but the majority of rainfall for the southeastern coast comes from the North-East monsoon.