Nilgiri Hills,

: At the Nilgiri Hills, the Eastern and Western Ghats converge. They are separated by the Moyar River from the Karnataka Plateau to the north. Parts of the Nilgiri Mountains border three national parks. In the northern part of the range where Kerala, Karnataka and Tamil Nadu meet, covering an area of 321 km2, lies Mudumalai National Park. In the southwestern part of the range, in Kerala, Mukurthi National Park covers an area of 78.5 km2, which includes an intact shola-grassland mosaic, the habitat of the Nilgiri Tahr. Just to the south, Silent Valley National Park lies parallel to those two parks, covering an area of 89.52 km2.

The Nilgiri Hills are part of the Reserve of the Nilgiri Biosphere and form part of India's protected bio-reserves. The Nilgiris sholas are home to over 2,700 species of flowering plants, 160 species of fern and fern allies, countless varieties of flowerless plants, mosses, fungi, algae, and ground lichens. There are not so many exotic animals at any other hill station. Mammals such as the Bengal tiger, Indian elephant, Indian leopard, Chital deer, Gaur, Sambar deer, Nilgiri tahr, etc are also kept. Reptiles found here are the Indian python, King cobra and Mugger crocodile.

Hence, the correct answer is option C.

Note: Tropical rainforests are the primary type of habitat. Montane forests and humid tropical forests are present here as well.