Identify the correctly matched pair/s:
1. Atolls - Low islands of coral reefs
2. Guyots - Flat topped seamount
3. Seamounts - Volcanic mountains with pointed summits
4. Submarine canyons - Chains of mountains separated by a large depression
Select the answer from the options given below:1
1, 2 and 3 only
2
1 and 2 only
3
1, 3 and 4 only
4
2, 3 and 4 only