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").

Example Input: Fact1: lungs are used for breathing air by land animals, Fact2: Elephants are the largest animals on land., Question: What uses lungs for breathing air? (A) rocks (B) some mammals (C) Frogs (D) monotremes (E) humans (F) bacteria (G) elephants (H) oak trees
Example Output: G

Example Input: Fact1: Blood pressure is highest in arteries and lowest in veins., Fact2: Blood Pressure Blood Pressure Blood pressure is the force of the blood on the artery walls., Question: is highest in arteries and lowest in veins. (A) matter (B) voltage (C) Length (D) solutes (E) glucose (F) measure (G) Force (H) Joules
Example Output: G

Example Input: Fact1: Viruses often infect bacteria., Fact2: Bacteria are normally classified as either 'good' bacteria or 'bad' bacteria., Question: How many types can viruses infect? (A) mice (B) pigs (C) bird (D) RNA (E) ova (F) tiny (G) HPV (H) Two
Example Output:
H