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: Consider Input: Problem: a rhombus has area 432 sq m, one diagonal is 36 cm. find other diagonal ?
Options: ['a. 2400 m', 'b. 2500 m', 'c. 2600 m', 'd. 2700 m', 'e. 2900 m']

Output: a


Input: Consider Input: Problem: income and expenditure of a person are in the ratio 7: 6. if the income of the person is rs. 14000, then find his savings ?
Options: a. 500, b. 1000, c. 1500, d. 2000, e. 2500

Output: d


Input: Consider Input: Problem: a is two years older than b who is twice as old as c. if the total of the ages of a, b and c be 17, the how old is b ? a. 7 b. 8 c. 9 d. 10 explanation :
Options: a. 6, b. 7, c. 9, d. 10, e. 11


Output: a