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: Mary and Tim were going on a trip.  They were both driving their cars.  Both were driving at the same speed and left at the same time.  However, Mary stopped at four in the afternoon, while Tim drove until it was dark. Question: Who drove farther? (A) Mary (B) Tim

Ex Output:
A


Ex Input:
Sentence: Tim has to push an ice sculpture across the ballroom in order to get his restaurant ready for a wedding. He notices that it is easier to push the sculpture when he moves it across the polished ballroom floor than when he moves it across the rough cobblestone floor. Question: If Tim is trying to keep the ice sculpture from melting, which surface should he push it across in order to produce less heat? (A) ballroom floor (B) cobblestone floor

Ex Output:
B


Ex Input:
Sentence: A microscope experiences less resistance when sliding across a lab table then when sliding across a lab floor. Question: Which surface will force the microscope to register less of an increase in temperature? (A) lab table (B) lab floor

Ex Output:

B