You will be given a definition of a task first, then some input of the task.
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").

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
Output:
G