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 salmon swimming through a river experiences low friction, while a salmon swimming through a creek experiences high friction. Question: Which river causes the temperature of the salmon to increase more? (A) river (B) creek
river

Sentence: An astronomer was studying the properties of some stars. She saw that one was a neutron star that was so densely packed with material that it had a far larger mass than an ordinary star that she was also observing. Question: Which of these stars would she expect to have a greater gravitational force? (A) neutron star (B) ordinary star
ordinary star

Sentence: Jamal is able to swim his usual speed, but he's feeling sluggish on Monday so he cuts his swimming workout short. On Tuesday, Jamal feels much more energetic, so he swims for a longer period of time. Question: On which day will Jamal swim fewer laps? (A) Tuesday (B) Monday

Tuesday