With reference to Ocean Mean Temperature (OMT), which of the following statements is/are correct?1.OMT is measured up to a depth of 26°C isotherm which is 129 meters in the south-western Indian Ocean during January-March.2.OMT collected during January-March can be used in assessing whether the amount of rainfall in monsoon will be less or more than a certain long-term mean.Select the correct using the code given below:

1. A

   1 only

   1 only. The 26°C isotherm is not a fixed 129 m in the SW Indian Ocean every January–March as stated.

2. B

   2 only

   2 only. January–March OMT is used as a monsoon-rainfall indicator versus the long-term mean.

3. C

   Both 1 and 2

   Both. Statement 1’s 129 m lock fails.

4. D

   Neither 1 nor 2

   Neither. Statement 2 holds.

Summary. Official key is (b) 2 only. Ocean Mean Temperature down to the 26°C isotherm in the south-west Indian Ocean (Jan–Mar) helps say whether monsoon rain will be above or below a long-period average. The isotherm depth is not a fixed 129 metres as statement 1 claims.