For short-term climatic predictions, which one of the following events, detected in the last decade, is associated with occasional weak monsoon rains in the Indian subcontinent?

Answer: Option C

For short-term climatic predictions, El Nino and southern oscillations, detected in the last decade, is associated with occasional weak monsoon rains in the Indian subcontinent. El Nino and the Southern Oscillation, also known as ENSO is a periodic fluctuation in sea surface temperature (El Nino) and the air pressure of the overlying atmosphere (Southern Oscillation) across the equatorial Pacific Ocean.