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: Any antigen that causes an allergy is called an allergen., Fact2: Many allergens can cause anaphylaxis., Question: What can cause anaphylaxis? (A) hormones (B) skin color (C) lamphreys (D) estrogen (E) whiplash (F) fumes (G) antigen (H) heat
Output:
G