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El Nino appears every:

A10 to 15 years
B2 to 5 years
C6 to 9 years
D1 to 2 years
Answer & Solution
Correct answer: B. 2 to 5 years
1. It is linked to the Southern Oscillation. 2. It recurs every 2 to 5 years. 3. Together they are called ENSO. _Source: syllabus Contemporary India I, Chapter 4, Climate._
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