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: The greatest number of four digits which is divisible by 15, 25, 40 and 75 is:

 Option A: 9400

 Option B: 9600

 Option C: 9800

 Option D: 9000

 Option E: 9200

Ex Output:
Option B


Ex Input:
Question: 0.002 x 0.008 = ?

 Option A: 1.6e-05

 Option B: 0.001

 Option C: 0.01

 Option D: 0.1

 Option E: NONE OF THESE

Ex Output:
Option A


Ex Input:
Question: f1(x)f1(x) = 2x - 1 and fn(x)=f1(fn−1(x))fn(x)=f1(fn−1(x)) for n ≥≥ 2. Find f5(2)

 Option A: 7

 Option B: 6

 Option C: 78

 Option D: 9

 Option E: 1

Ex Output:

Option A