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: Arteries generally carry oxygen-rich blood., Fact2: Most strokes occur when a blood clot blocks an artery that carries oxygenated blood to the brain., Question: What happens when oxygenated blood doesn't reach the brain? (A) anemia (B) Dehydration (C) blood flows to the heart (D) increased iron in the brain (E) arteries unclog (F) It decreases (G) a stroke (H) fever
Output:
G