Detailed Instructions: You are given a sentence, a question and two answer options ('A' and 'B'). Your task is to find the correct answer (return the string of the correct option, not 'A' or 'B') for the given question.
Problem:Sentence: Mark has offered to tow his friends truck which has broken down. It is very heavy, which is causing delay in speeding up. Question: This truck must be which? (A) Pickup Truck (B) King Cab Truck
Solution:
King Cab Truck