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: Three cards are drawn successively, without replacement from a pack of 52 well shuffled cards.
What is the probability that first two cards are queens and the third card drawn is an ace?

 Option A: 2

 Option B: 2/5525

 Option C: 2/5527

 Option D: 3

 Option E: None

Ex Output:
Option B


Ex Input:
Question: A is twice as fast as B. If B alone can do a piece of work in 18 days, in what time can A and B together complete the work?

 Option A: 10

 Option B: 16

 Option C: 18

 Option D: 6

 Option E: 12

Ex Output:
Option D


Ex Input:
Question: The population of a town is 8000. It decreases annually at the rate of 20% p.a. What will be its population after 3 years?

 Option A: 5100

 Option B: 4096

 Option C: 5200

 Option D: 5400

 Option E: 5500

Ex Output:

Option B