You will be given a definition of a task first, then some input of the task.
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.

Problem: the floor of a rectangular room is 18 m long and 12 m wide. the room is surrounded by a veranda of width 2 m on all its sides. the area of the veranda is :
Options: a. 124 m 2, b. 126 m 2, c. 136 m 2, d. 158 m 2, e. none of these
Output:
c