Read the following statements about La Nina carefully:

1. La Nina is considered as younger sister of El Nino  
2. La Nina is related to the warming of the western Pacific Ocean
3. La Nina event was identified and named as La Nina phenomenon in the year 1986

Which of the statements is/are true?

Options:

1. Only 3
2. Only 1
3. Only 2
4. All of the above

Correct Answer