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: Rob traveled a distance of 30 km, covering the first 10 km in x minutes, the next 10 km in y minutes and the last 10 km in z minutes. If he totally took 3y minutes to cover the whole distance, then which of the following cannot be true? Assume x , y and z are different.

 Option A: z=3x

 Option B: x=3z

 Option C: y=2x

 Option D: x=2y

 Option E: y=3x

Output: Option D


Input: Consider Input: Question: A man has $480 in the denominations of one-Dollar, five-Dollar notes and ten-Dollar. The number of Dollars of each denomination is equal. What is the total number of Dollar that he has ?

 Option A: 50

 Option B: 60

 Option C: 90

 Option D: 48

 Option E: 67

Output: Option C


Input: Consider Input: Question: What is the least value of x, So that 2x4472 is divisible by 9

 Option A: 7

 Option B: 8

 Option C: 9

 Option D: 3

 Option E: 2


Output: Option B