Detailed Instructions: In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").
Q: Fact1: dew is formed when water vapor condenses over night, Fact2: Condensation is water vapor changing to liquid water., Question: How is dew formed? (A) When a liquid disappears (B) Vapor turning into a liquid (C) photosyntehsis (D) Something made from fermented ricce (E) a hemisphere is tilted away from the sun (F) Liquid turning into vapor (G) At the peak of a mountain (H) When water evaporates
A:
B