उष्ण कटिबंधीय आवर्ताच्या खालील नमूद वैशिष्टयांमधून योग्य पर्याय निवडा :
अ. उष्ण कटिबंधीय आवर्ताच्या केंद्रस्थानी उबदार हवा असते.
ब. उष्ण कटिबंधीय आवर्ताच्या केंद्रस्थानी ढग नसतात.
क. उष्ण कटिबंधीय आवर्तात दाबाचा उतार सौम्य असतो.
ड. उष्ण कटिबंधीय आवर्तात सरासरी 50 ते 100 सेमी पाऊस पडतो.
योग्य पर्याय निवडा :

The correct answer is Option C (a, b and d).

Key Points:
• Meteorological Structure of Tropical Cyclones:
• Statement (a) is correct: They possess a warm core sustained by continuous latent heat release from condensing water vapor aloft.
• Statement (b) is correct: The central "Eye" is a region of subsiding air, calm winds, and predominantly cloudless skies surrounded by dense eyewall clouds.
• Statement (d) is correct: Associated torrential downpours frequently yield massive aggregated rainfall amounts between 50 to 100 cm along landfall zones.
• Why Statement (c) is false:
• Tropical cyclones feature a steep / intense pressure gradient with closely spaced isobars, which drives destructive, gale-force rotating winds. Temperate/extratropical depressions, by contrast, possess gentle pressure gradients.
• Therefore, characteristics a, b, and d are correct (Option 3).
• Key Takeaway: Tropical cyclones exhibit warm-core centers, clear calm central eyes, and torrential rain (50-100 cm), driven by steep (not gentle) pressure gradients.