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.

[Q]: Sentence: A banjo slides at a low rate of speed across a porch swing, but a high rate of speed across the porch of Mike's old house. Question: Which surface is going to give the banjo a rougher ride? (A) porch swing (B) porch
[A]: B


[Q]: Sentence: Two paper planes are thrown at a time, into the air. One is made of thick cardboard, one is made of thin paper. Question: Which paper plane flies faster? (A) cardboard plane (B) paper plane
[A]: A


[Q]: Sentence: Matt knows that the air indoors is calmer then the air outdoors. Question: Which area will he be forced to throw his frisbee slower in? (A) indoors (B) outdoors
[A]:
A