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 hair brush experiences low resistance when slid across a porcelain tile compared to when it is slid across a throw rug. Question: Which surface will allow the hair brush to slide a greater distance? (A) throw rug (B) porcelain tile
Example Output: A

Example Input: Sentence: A camera slid along a folding table moves gently, while one slid along a card table bumps along. Question: Which type of table will allow the camera to slide at a greater rate of speed? (A) folding table (B) card table
Example Output: B

Example Input: Sentence: Sam is standing in an underground tunnel. It's pretty dim where he is but he can spot two lights. The light to the west appears brilliant, and the light to the east appears pretty dim. Question: If he wants to walk to the closest light, which was should he go? (A) east (B) west
Example Output:
A