The correct option is (c).
Explanation
The Himalayas consist of three parallel ranges in their longitudinal extent. The northernmost range is known as the Great or Inner Himalayas or the 'Himadri'. It represents the geologically oldest and most prominent part of the mountain system.Statement-wise Analysis:
- Statement 1 is Correct: The Himadri is the most continuous range of the Himalayas. It contains the loftiest peaks in the world, including Mount Everest and Kanchenjunga, with an average height of 6,000 metres.
- Statement 2 is Incorrect: The folds of the Great Himalayas are asymmetrical in nature. Due to intense tectonic compression from the Indian plate pushing against the Eurasian plate, the geological structure is not symmetrical; the southern slopes are typically steeper than the northern slopes.
- Statement 3 is Correct: The core of the Great Himalayas is composed of granite. These crystalline rocks form the base of the range, which is perennially snowbound and serves as the source for numerous glaciers.
Key Takeaway: The Great Himalayas (Himadri) are defined by their high average altitude (6,000m), continuous extent, asymmetrical geological folds, and a core composed of granite.