Explanation:

Let's match the peaks of the Himalayas to their correct heights:

- Option 1: 1-a, 2-b, 3-c, 4-d

- This option assigns heights randomly without logic.

- Option 2: 1-c, 2-b, 3-c, 4-d

- Here, heights are duplicated, which isn't correct.

- Option 3: 1-b, 2-a, 3-d, 4-c

- Each peak matches correctly with its unique height.

- For example, Mount Everest (1) has the height b, 8,848 meters.

- Option 4: 1-d, 2-c, 3-b, 4-a

- Peaks don't align with recognized heights of the Himalayas.

Option 3 is the correct answer.