In which condition is dew more likely than frost?

Correct answer: The surface cools to the dew point but remains above freezing

Correct answer: B. Dew and frost both require cooling and moisture, but surface temperature determines whether the deposit is liquid or solid. If a moist surface cools to the dew point while remaining above 0°C, water vapour condenses into liquid droplets, producing dew. Option B is correct because it includes both necessary conditions: reaching the dew point and staying above the freezing point. Option A is wrong because a surface below freezing favours frost or ice deposition rather than ordinary liquid dew. Option C is wrong because without water vapour there is no material from which dew or frost can form. Option D is wrong because a hot, dry surface is unlikely to reach saturation and cannot readily collect condensation. Do not confuse dew point with freezing point: the dew point controls condensation, while the freezing point helps determine whether the deposit is liquid or ice. Memory cue: above freezing gives dew; at or below freezing favours frost.