Which Indian climate term is correctly associated with source or location “it involves unusual cooling in the central and eastern equatorial Pacific”, and also with “it alters tropical atmospheric circulation and can influence the Indian monsoon”?

Correct Answer: Option B — La Nina. La Nina is correctly identified as it involves unusual cooling in the central and eastern equatorial Pacific. La Nina is also associated with it alters tropical atmospheric circulation and can influence the Indian monsoon. Another identifying fact about La Nina is that it alters tropical atmospheric circulation and can influence the Indian monsoon. A further exam-relevant fact about La Nina is that La Nina should not be treated as a guaranteed cause of uniform excess rain across India. Why the other options are incorrect: • Option A — Southwest Monsoon: Southwest Monsoon is it reaches India from the Arabian Sea and Bay of Bengal sectors. It is incorrect here because Southwest Monsoon is instead associated with the Western Ghats cause strong orographic rainfall on their windward side. • Option C — Northeast Monsoon: Northeast Monsoon is it is especially important for rainfall over coastal Tamil Nadu. It is incorrect here because Northeast Monsoon is instead associated with winds cross the Bay of Bengal and acquire moisture before reaching the southeast coast. • Option D — Inter-Tropical Convergence Zone: Inter-Tropical Convergence Zone is its seasonal northward shift influences the Indian summer monsoon. It is incorrect here because Inter-Tropical Convergence Zone is instead associated with rising warm moist air encourages cloud formation and convection. Exam Takeaway: Connect La Nina with “it involves unusual cooling in the central and eastern equatorial Pacific” and “it alters tropical atmospheric circulation and can influence the Indian monsoon” for revision.