Consider the following statements about IOD

1. It is the sea surface temperatures in which the western Indian Ocean becomes alternately warmer and then colder than the eastern part of the ocean.

2. It occurs every two years.

Which of the above statements is/are correct?

a. Only 1

b. Only 2

c. Both

d. None

ANSWER: Only 1

Explanation:

The Indian Ocean Dipole(IOD) also known as the Indian Nino is an irregular oscillation of sea-surface temperatures in which the western Indian Ocean becomes alternately warmer and then colder than the eastern part of the ocean.