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: A plastic bottle rolling across a picnic table experiences low friction, while a plastic bottle rolling across a lawn experiences high friction. Question: Which surface will make the plastic bottle get hotter as it rolls across? (A) picnic table (B) lawn
Example Output: A

Example Input: Sentence: Rolling a golf ball along the fairly is very easy, but rolling one along tall grass is difficult. Question: Which surface will let a golf ball roll for a longer distance? (A) fairway (B) tall grass
Example Output: B

Example Input: Sentence: A globe rolling around on a library floor experiences less resistance then one rolling around on a study floor. Question: Which floor will cause the globe to heat up less when rolled across it? (A) study floor (B) library floor
Example Output:
A