Definition: Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
Input: Problem: two trains each 120 m in length each, are running on two parallel lines in opposite directions. if one goes at the speed of 85 km / h while the other travels at 65 km / h. how long will it take for them to pass each other completely.
Options: a. 11.07 sec, b. 10.07 sec, c. 13.07 sec, d. 12.07 sec, e. 14.07 sec
Output:
b