Consider the following statements with regard to Himalaya.
1. Mt Everest, Kanchenjunga fall in the inner Himalaya.
2. The inner Himalaya has an average altitude of 6000 metres.
3. Kothri Dun and Patli Dun are longitudinal valley.
Which of the above statements is/are correct?
(a) 1, 2 and 3 (b) 1 and 2 (c) 1 and 3 (d) 3 only