You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

Input: Consider Input: Question: For positive integers x and z, which of the following can be written as z^2?

 Option A: x^2+1

 Option B: x^2-1

 Option C: x^2-24

 Option D: x^2+11

 Option E: x^2-11

Output: Option D


Input: Consider Input: Question: The fourth proportional to 12, 14 and 12 is?

 Option A: 14

 Option B: 66

 Option C: 77

 Option D: 88

 Option E: 99

Output: Option A


Input: Consider Input: Question: A is three years older than B who is thrice as old as C. If the total of the ages of A, B and C be 27, the how old is B?

 Option A: 10 years

 Option B: 12 years

 Option C: 14 years

 Option D: 15 years

 Option E: 8 years


Output: Option E