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.

Example Input: Question: In what time will a train 200 m long cross an electric pole, it its speed be 144 km/hr?

 Option A: 2.5 sec

 Option B: 2.9 sec

 Option C: 3.5 sec

 Option D: 7.5 sec

 Option E: 5 sec
Example Output: Option E

Example Input: Question: A and B complete a job in 6 days. A alone can do the job in 15 days. If B works alone, how many days will it take to complete the job?

 Option A: 8

 Option B: 10

 Option C: 12

 Option D: 14

 Option E: 16
Example Output: Option B

Example Input: Question: A reduction in the price of petrol by 10% enables a motorist to buy 5 gallons more for $300. Find the original price of petrol?

 Option A: $11

 Option B: $5

 Option C: $45

 Option D: $400

 Option E: $6.6
Example Output:
Option E