Correct Answer: Coromandel Coast

Solution : The correct answer is Coromandel Coast.

The Coromandel Coast is not a part of the western coastal plains. The Coromandel Coast is located on the eastern side of the Indian Peninsula, along the Bay of Bengal. In contrast, the western coastal plains include regions like Konkan, Malabar Coast and Kannad Plain, which are situated along the Arabian Sea on the western side of the Indian Peninsula.