You are given a sentence, a question and two answer options. Your task is to write down the index ('A' or 'B') of the **incorrect** option for the given question.

Example input: Sentence: Jacob and Benny are squatting at the gym. Jacob has thin frail legs and Benny has big strong legs. Question: Who squats less weight? (A) Jacob (B) Benny
Example output: B
Example explanation: Typically, people with thin frail legs squat less weight than people with big strong legs, so the incorrect answer is Benny.
Q: Sentence: Mary was practicing karate by trying to break objects. She broke the plywood easily with her hand, but couldn't break the wooden stud no matter how hard she hit it. Question: Which object is the thicker one? (A) plywood (B) wooden stud
A:
A