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: A certain company reported that the revenue on sales increased 40 % from 2000 to 2003, and increased 90 % from 2000 to 2005. What was the approximate percent increase in revenue for this store from 2003 to 2005?

Option A: 50 %

Option B: 36 %

Option C: 30 %

Option D: 32 %

Option E: 29 %

Ex Output:
Option B

Ex Input:
Question: Two trains are moving at 60 kmph and 70 kmph in opposite directions. Their lengths are 150 m and 100 m respectively. The time they will take to pass each other completely is?

Option A: 5 sec

Option B: 6 sec

Option C: 7 sec

Option D: 8 sec

Option E: 9 sec

Ex Output:
Option C

Ex Input:
Question: If six persons sit in a row, then the probability that three particular persons are always together is -

Option A: 1/9

Option B: 1/7

Option C: 1/5

Option D: 1/1

Option E: 1/3

Ex Output:
Option C