The temperature-depth profile of the ocean is an interesting topic of study. Which of the following statements is/are incorrect regarding this?

1. About 90 per cent of the total volume of water is found below the thermocline in the deep ocean.

2. The thermocline layer is characterised by a rapid decrease in temperature with increasing depth.

3. The highest temperature of the ocean waters is recorded at the equator.

Identify the correct answer from the codes given below.