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Fog and frost in North India during cold weather are linked with which common base?

Answer and explanation

Correct answer: Low temperature and moisture near surface

Fog and frost are both cold-weather phenomena connected with low temperature and moisture close to the ground. Fog forms when air near the surface cools enough for water vapour to condense into tiny suspended droplets. Frost forms when the surface or nearby objects become cold enough for moisture to freeze as ice crystals. Thus, their common base is not exactly the same final process, but both require suitable moisture and strong cooling near the surface. Option A is the best answer. Loo, dust storms, monsoon floods, and cyclones belong to different weather situations.

The wording “common base” is important. Fog is liquid water droplets in the air, whereas frost is frozen moisture deposited on a surface. In North India during winter, clear nights, calm air, and cooling can favour these conditions. The option mentioning low temperature and near-surface moisture captures the shared requirement without claiming that fog and frost are identical. Therefore, the supplied answer A is scientifically appropriate for the school-level question.

Related tags

FogFrostWinter

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