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").
Input: Fact1: Female monotremes lack a uterus and vagina., Fact2: Like the echidna, a platypus is a monotreme., Question: What does a platypus lack? (A) a cuticle (B) Uterus (C) tail fins (D) Eyes (E) Tail (F) Energy. (G) Energy (H) Heart
Output:
B