The correct option is
D Western ghats and Assam
The following are the principal types of natural vegetation in India:
(1) Tropical evergreen rain forest.
(2) Deciduous or monsoon type of forests.
(3) Dry deciduous forests and scrubs.
(4) Semi-desert and desert vegetations.
(5) Tidal or mangrove forests and (6) mountain forests.
Tropical evergreen rain forests grow in areas, where rainfall is more than 200 cm. They are mainly found on the slopes of the Western Ghats and the Northeastern regions of Arunachal Pradesh, Meghalaya, Assam, Nagaland, the Tarai areas of the Himalayas and the Andaman groups of Islands. The trees in these belts have dense growth. Important varieties of trees are sishu, rosewood, mahogany, bamboo, garjan and sandalwood.