✅ Answer: B) Mawsynram, MeghalayaMawsynram in Meghalaya receives the highest annual rainfall in the world (~11,872 mm/year). Cherrapunji (Sohra) is nearby and was previously considered the wettest place. Both receive heavy rainfall because they are located on the southern slopes of the Meghalaya plateau, which acts as a funnel for the Bay of Bengal branch of the SW monsoon.

✅ Answer: B) North-western IndiaThe Loo is a hot, dry, and dusty wind that blows in the afternoon during summer (May-June) in north-western India — Punjab, Haryana, UP, and Rajasthan. It can cause heat strokes. Temperatures can reach 45-48°C. The Loo is caused by the intense heating of the Thar Desert region.

✅ Answer: B) Weakening the monsoon and causing droughtEl Niño (warming of central/eastern Pacific Ocean) weakens the Indian monsoon and can cause drought. It disrupts the Walker Circulation and reduces the pressure gradient that drives the monsoon. La Niña (cooling of Pacific) strengthens the monsoon. The 2002 and 2009 droughts in India were associated with El Niño.

✅ Answer: B) June 1The Southwest monsoon normally arrives in Kerala by June 1. It then advances northward — reaching Mumbai by June 10, Delhi by July 1, and covering the entire country by July 15. The withdrawal starts from NW India in September and is complete by October 15. The onset of monsoon in Kerala is a major meteorological event.

✅ Answer: C) West Bengal and AssamKalbaisakhi (Nor’westers) are violent pre-monsoon thunderstorms that occur in West Bengal and Assam during April-May. They blow from the northwest and are associated with hailstorms and strong winds. They are beneficial for jute and rice cultivation. “Mango showers” in Kerala and “Cherry blossoms” in Karnataka are similar pre-monsoon showers.

✅ Answer: B) Northeast monsoon (October-December)Tamil Nadu receives most of its rainfall during the Northeast monsoon (October-December). This is because Tamil Nadu is on the leeward side of the Western Ghats during the SW monsoon (rain shadow zone) but on the windward side during the NE monsoon. Chennai receives ~60% of its annual rainfall during the NE monsoon.

✅ Answer: C) North-western IndiaWestern Disturbances are cyclonic storms that originate in the Mediterranean Sea and travel eastward. They bring winter rainfall (December-February) to north-western India — Punjab, Haryana, J&K, Himachal Pradesh, and Uttarakhand. This rainfall is crucial for the rabi crop (wheat). They also cause snowfall in the Himalayas.

✅ Answer: B) Jaisalmer, RajasthanJaisalmer in Rajasthan receives the lowest annual rainfall in India (~100 mm/year). It is located in the Thar Desert. The Thar Desert is a rain shadow area — the Aravalli range runs parallel to the Arabian Sea branch of the monsoon, preventing moisture from reaching Rajasthan. Leh in Ladakh also receives very low rainfall (~100 mm/year).

✅ Answer: B) Bay of Bengal has warmer, shallower waterCyclones are more frequent in the Bay of Bengal (~80% of all cyclones) because it has warmer, shallower water and more moisture from rivers. However, Arabian Sea cyclones are more intense because the Arabian Sea has deeper, warmer water. Cyclone season is pre-monsoon (April-May) and post-monsoon (October-December).

✅ Answer: B) Warmer western Indian Ocean = stronger monsoonA Positive IOD means the western Indian Ocean (near Africa) is warmer than the eastern Indian Ocean (near Indonesia). This strengthens the Indian monsoon by increasing moisture supply. A Negative IOD (warmer eastern Indian Ocean) weakens the monsoon. The IOD is sometimes called the “Indian Niño.”