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: DNA contains genetic instructions for proteins, and RNA helps assemble the proteins., Fact2: DNA is the genetic material responsible for heredity., Question: The genetic material responsible for heredity contains what? (A) wavelengths and photons (B) instructions for proteins (C) characteristics (D) pre-assembled proteins (E) organelles (F) Chemical energy (G) A compound that donates proton (H) blood
Example Output: B

Example Input: Fact1: skin is used for protecting the body from harmful substances, Fact2: Skin is a protective organ., Question: What does skin help keep out? (A) medicine (B) sun's heat (C) heat (D) hurtful words (E) a pathogens (F) parasites (G) harmful substances (H) Echinoderm.
Example Output:
G