Explanation:

- Option 1: Three

- The Himalaya consists of three major parallel ranges in its longitudinal extent. These include the Shivalik Hills, Lesser Himalayas (or Himachal), and Greater Himalayas (also known as Himadri).

- The Shivalik Hills form the outermost range.

- The Lesser Himalayas are a set of intermediate ranges.

- The Greater Himalayas are the highest part of the Himalayas.

- Option 2: Five

- Five does not accurately depict the number of parallel ranges recognized in the Himalayas' longitudinal extent.

- Option 3: Four

- Four may consider some subcategories but is not commonly accepted as the standard division.

- Option 4: Two

- Two is not accurate as it overlooks the complexity of the ranges.

- Correct Answer: Option 1, Three