Concept:Tropical rainforests, also called tropical evergreen forests, need very high rainfall (over 200 cm) and warm, humid conditions to thrive.
Explanation:These forests are found in regions with heavy and consistent rainfall throughout the year.
In India, they occur mainly in the Western Ghats, parts of Northeast India, and the Andaman & Nicobar Islands.
Assam lies in the Northeast, which receives abundant rainfall and has tropical rainforests.
Rajasthan, Gujarat, and Madhya Pradesh have much drier climates, supporting thorn forests or deciduous forests instead.
Answer:A. Assam