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.

Ex Input:
Sentence: Gary is trying to bend different things. He tries to bend a rubber mat and a wooden pencil. Question: Which breaks first? (A) rubber mat (B) wooden pencil

Ex Output:
A


Ex Input:
Sentence: A dirty tooth isn't as smooth as a clean tooth. Question: Which surface will a toothbrush move over at a greater rate of speed? (A) dirty tooth (B) clean tooth

Ex Output:
A


Ex Input:
Sentence: Bob likes to skip rocks across the lake. He skipped rocks on a calm day when the lake was smooth and on a windy day when the lake was choppy. He noticed that the rock encountered less friction on the smooth lake than the choppy lake. Question: Which lake would the rock skip farther on? (A) The smooth lake (B) The choppy lake

Ex Output:

B