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.

Ex Input:
Question: There are 9 executives, including the CEO and CFO, that are asked to form a small team of 5 members. However, the CEO and CFO may not both be assigned to the team. Given this constraint, how many ways are there to form the team?

Option A: 85

Option B: 87

Option C: 89

Option D: 91

Option E: 93

Ex Output:
Option D

Ex Input:
Question: Every year an amount increases by 1/8th of itself. How much will it be after two years if its present value is Rs.1600?

Option A: 3000

Option B: 4200

Option C: 2025

Option D: 1205

Option E: 3251

Ex Output:
Option C

Ex Input:
Question: If six persons sit in a row, then the probability that three particular persons are always together is?

Option A: 1/6

Option B: 1/1

Option C: 1/5

Option D: 1/9

Option E: 1/2

Ex Output:
Option C