The correct option is (c).
Explanation
The Himalayan mountain system consists of three parallel longitudinal ranges: the Great Himalayas (Himadri), the Lesser Himalayas (Himachal), and the Outer Himalayas (Shiwaliks). Each range is distinguished by specific altitudinal and latitudinal characteristics.
Statement-wise Analysis:
- Statement 1 is Correct: The range lying immediately south of the Himadri is known as the Himachal or the Lesser Himalaya. It forms the most rugged mountain system within the Himalayas.
- Statement 2 is Incorrect: The altitude of the Himachal range varies between 3,700 and 4,500 metres. The altitude range of 900 to 1,100 metres is characteristic of the Shiwaliks (Outer Himalayas), while the range mentioned in the statement (1,000–2,000 metres) does not define the Himachal range.
- Statement 3 is Correct: The average width of the Himachal range is approximately 50 km. This range is mainly composed of highly compressed and altered rocks and includes prominent ranges such as the Pir Panjal and the Dhaula Dhar.
Key Takeaway:
The Himachal (Lesser Himalaya) is situated between the Himadri and the Shiwaliks, characterized by an altitude of 3,700–4,500 metres and an average width of 50 km.