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: 387 x 387 + 114 x 114 + 2 x 387 x 114 = ?
Options: a. 250001, b. 251001, c. 260101, d. 261001, e. none of these
Output:
b