Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Problem: two trains a and b starting from two points and travelling in opposite directions, reach their destinations 9 hours and 16 hours respectively after meeting each other. if the train a travels at 80 kmph, find the rate at which the train b runs.
Options: a. 40, b. 160, c. 120, d. 80, e. 100
Student:
b