2023 · Q75
Consider the following statements:
- 1Many of the world's largest mountain chains exist beneath the sea.
- 2Some mountain chains are revealed as island arcs.
- 3The mid-oceanic ridges form the longest mountain chains.
- 4The mid-Atlantic ridge rises thirty-three metres above the floor of the Atlantic.
Which of the statements given above are correct?
indian-world-geographygeomorphology
- A1 and 2 only
- B3 and 4 only
- C1, 2 and 4 only
- D1, 2 and 3 only
Explanation
The mid-oceanic ridges form the longest mountain chains on Earth and lie mostly beneath the sea (statements 1 and 3), and where they rise above sea level they appear as island arcs and volcanic islands such as Iceland (2). The Mid-Atlantic Ridge rises two to three kilometres, not thirty-three metres, above the Atlantic floor, so statement 4 is wrong. Hence statements 1, 2 and 3 only.