A
Himadri Range
B
Aravalli Range
C
Western Ghat
D
Vindhya Range
Correct answer: (a) Himadri Range
Explanation
- A
Himadri Range
(a) Himadri Range. The Great Himalaya (Himadri) is a young fold mountain of the Alpine orogeny, the youngest of the four listed. That is the official key.
- B
Aravalli Range
(b) Aravalli Range. Aravallis are among the oldest fold mountains of India (Precambrian), the opposite of ‘youngest’.
- C
Western Ghat
(c) Western Ghat. The Western Ghats are old block/relict mountains, not the youngest fold range of India.
- D
Vindhya Range
(d) Vindhya Range. Vindhyas are ancient residual mountains of peninsular India, far older than the Himalaya.
Summary. Official key is (a). Himadri (Great Himalaya) is India’s youngest major range. Aravalli, Western Ghats and Vindhya are old peninsular highlands.