The correct option is Coromandel Coast.
Explanation
The retreating monsoon season, typically spanning October to December, marks the withdrawal of the Southwest Monsoon and the onset of the Northeast Monsoon. During this transition, the Inter-Tropical Convergence Zone (ITCZ) shifts southward. This period is characterized by the reversal of winds and the frequent formation of cyclonic depressions in the Bay of Bengal and the Andaman Sea.
Option Analysis
- Coromandel Coast (Correct): This region, covering the coastal areas of Tamil Nadu and southern Andhra Pradesh, lies in the rain shadow area of the Western Ghats during the Southwest Monsoon. However, during the retreating monsoon, the Northeast trade winds pick up moisture from the Bay of Bengal and strike this coast. Furthermore, cyclonic depressions originating in the Bay of Bengal often move westward towards the East Coast, providing the bulk of the annual rainfall to this region.
- Malabar Coast (Incorrect): Located on the southwestern coast (Kerala), the Malabar Coast receives the majority of its heavy rainfall from the Arabian Sea branch of the Southwest Monsoon (June to September). While it receives some showers during the retreating phase, it is not the primary source of its bulk rainfall.
- Konkan Coast (Incorrect): The Konkan Coast (Maharashtra and Goa) receives very heavy precipitation during the summer (Southwest) monsoon. It remains relatively dry during the retreating monsoon season as the winds blow from land to sea in this region.
- Gujarat Coast (Incorrect): This region receives its rainfall primarily from the Southwest Monsoon. The retreating monsoon winds are generally dry by the time they cross the Indian landmass, and the region does not typically receive bulk rainfall from Bay of Bengal cyclones during this season.
Key Takeaway: The Coromandel Coast is distinct from the rest of India because it receives the majority of its precipitation during the winter season (October-December) via the Northeast Monsoon and associated tropical cyclones.