You are given a sentence, a question and two answer options ('A' and 'B'). Your task is to find the **incorrect** answer (return the string of the incorrect option, not A/B).

Sentence: A knob rolled across a wooden table travels at a lower rate of speed then one rolled across a metal table. Question: Which surface provides more friction to the knob? (A) wooden table (B) metal table
metal table

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
bathroom rug

Sentence: Paula rarely has to wash her usually pristine gym gear after a personal training session, but Rachel almost always has to put her sweat-drenched workout clothes right into the dirty laundry. Question: Who does more exercising during their time at the gym? (A) Rachel exercises more (B) Paula exercises more
Paula exercises more