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: Thrusting a throwing star into yogurt heats it up less then thrusting it into jelly. Question: Which surface allows the throwing star to reach a higher top speed as it is thrust into it? (A) jelly (B) yogurt

Ex Output:
A


Ex Input:
Sentence: A tape measure sliding across plywood has more resistance then one sliding across a writing desk. Question: Which surface will make the tape measure get hotter? (A) writing desk (B) plywood

Ex Output:
A


Ex Input:
Sentence: Sarah brushed her hair. Some fell off and turned into a hairball on the bathroom rug. Then Joe walked across the bathroom. The hairball moved a foot across the rug. then it moved a few inches across the pile of laundry next to the rug. Question: On which of these areas did the hairball encounter more friction? (A) bathroom rug (B) pile of clothes

Ex Output:

A