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: The average expenditure of a labourer for 6 months was 90 and he fell into debt. In the next 4 months by reducing his monthly expenses to 60 he not only cleared off his debt but also saved 30. His monthly income i

 Option A: 70

 Option B: 72

 Option C: 75

 Option D: 78

 Option E: 81
Example Output: Option E

Example Input: Question: Find the value of y from (12)^3 x 6^4 ÷ 432 = y?

 Option A: 3451

 Option B: 3467

 Option C: 3891

 Option D: 4601

 Option E: 5184
Example Output: Option E

Example Input: Question: Two trains of length 300 m and 200 m are 100 m apart. They start moving towards each other on parallel tracks, at speeds 54 kmph and 90 kmph. In how much time will the trains cross each other?

 Option A: 87/7 sec

 Option B: 80/7 sec

 Option C: 80/9 sec

 Option D: 80/5 sec

 Option E: 15 sec
Example Output:
Option E