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").

Ex Input:
Fact1: Wings are part of the exoskeleton and attached to the thorax., Fact2: Insect wings are attached to the dorsal side of their thorax., Question: What side of an insect are wings attached to? (A) white (B) dorsal (C) protected (D) abdomen (E) elytra (F) three (G) strong (H) tail

Ex Output:
B

Ex Input:
Fact1: Pneumonia may be caused by an infection or injury of the lungs., Fact2: Lung injuries are treated with bronchodilatory treatment., Question: What treatment can be used in treating pneumonia? (A) the respiratory system (B) a breathing mask (C) bronchodilatory treatment (D) aqueous solution (E) immunotherapy (F) radiation therapy (G) immune system (H) chemotherapy

Ex Output:
C

Ex Input:
Fact1: skin is used for breathing air by frogs, Fact2: For example, the frog is covered with skin that is porous to air., Question: Frogs breathe through their skin, which is what? (A) poured (B) filtered (C) fibrous (D) warm (E) unique (F) evolving (G) porous (H) fermented

Ex Output:
G