Definition: 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").
Input: Fact1: a solar panel converts sunlight into electricity, Fact2: Sunlight is composed of photons, or particles of solar energy., Question: A solar panel converts what into electricity? (A) neutrons (B) photons (C) an object (D) water (E) sugar (F) Light (G) sun's heat (H) nitrogen
Output:
B