The correct option is Tamil Nadu Coast.
Explanation
The Indian monsoon system reverses its direction during the winter months. Following the withdrawal of the Southwest Monsoon, the Northeast Monsoon (also known as the Retreating Monsoon) sets in, characterized by high pressure over the landmass and low pressure over the surrounding seas.
Detailed Analysis:
- Mechanism of Rainfall: During October and November, the winds blow from the land towards the sea (from the Northeast to the Southwest). Since these winds originate over the vast landmass of Asia, they are generally dry.
- Exception (Tamil Nadu Coast): A portion of these winds blows over the Bay of Bengal. As they traverse the sea, they pick up significant moisture. When these moisture-laden winds strike the Coromandel Coast (Tamil Nadu Coast), they are obstructed by the Eastern Ghats, resulting in torrential rainfall.
- Comparison with Other Regions:
- Konkan and Gujarat Coasts: These regions receive the bulk of their rainfall from the Southwest Monsoon (June-September). During the Northeast Monsoon, the winds in these regions are offshore (blowing from land to sea) and devoid of moisture, resulting in dry weather.
- Malabar Coast: While Kerala does receive some rainfall during the retreating monsoon phase, the Tamil Nadu coast is the primary beneficiary of the Northeast Monsoon, receiving nearly half of its annual precipitation during this season.
Key Takeaway:
The Tamil Nadu Coast is the principal region in India that receives the majority of its rainfall during the winter months (October-December) due to the Northeast Monsoon winds picking up moisture from the Bay of Bengal.