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: If p/8 = r/2 and r = 0.75s, what is the ratio of p to r to s?

Option A: 2 : 3 : 4

Option B: 8 : 12 : 9

Option C: 24 : 6 : 8

Option D: 6 : 4 : 3

Option E: 12 : 8 : 3

Ex Output:
Option C

Ex Input:
Question: The banker's discount on Rs. 1600 at 10% per annum is the same as true discount on Rs. 1680 for the same time and at the same rate. The time is :

Option A: 2 months

Option B: 4 months

Option C: 6 months

Option D: 7 months

Option E: None

Ex Output:
Option C

Ex Input:
Question: 6 chess players take part in a tournament. Every player plays twice with each of his opponents. How many games are to be played?

Option A: 19

Option B: 20

Option C: 30

Option D: 33

Option E: 34

Ex Output:
Option C