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: The average age of 3 boys is 15 years and their ages are in the proportion 1:2:3. The age of the youngest boy is?

 Option A: 10 years

 Option B: 12 years

 Option C: 15 years

 Option D: 18 years

 Option E: 7.5 years

Output: Option E


Input: Consider Input: Question: A coin is tossed two times. What is the probability that there is at the least one tail?

 Option A: 3/4

 Option B: 31/37

 Option C: 31/18

 Option D: 31/10

 Option E: 31/19

Output: Option A


Input: Consider Input: Question: If x=2, which of the following is(are) true? I. x^2=2x II x/-4 = 1 III |x|=-x

 Option A: II only

 Option B: III only

 Option C: II,III only

 Option D: I only

 Option E: I,III only


Output: Option D