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: If x, y, and z are positive integers such that x is a factor of y and y is a factor of z, which of the following is NOT necessarily an integer?

Option A: (x + y

Option B: (y + z

Option C: yz/x

Option D: (2y + 3z

Option E: (xy + z

Output: Option A

Input: Consider Input: Question: Kiran is younger than Bineesh by 7 years and their ages are in the respective ratio of 7:9. How old is Kiran?

Option A: 22.5

Option B: 24.5

Option C: 23.5

Option D: 25.5

Option E: 26.5

Output: Option B

Input: Consider Input: Question: A, B two inlet pipes takes 15,18 minutes to fill the tank and C an oulet pipe takes 45 minutes to empty the tank respectively. In what time the tank be filled if all of them are operated together?

Option A: 11 minutes

Option B: 10 minutes

Option C: 12 minutes

Option D: 13 minutes

Option E: 14 minutes
Output: Option B