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: Find the number of square tiles to cover the floor of a room measuring 6 m * 11 m leaving 0.50 m space around the room. A side of square tile is given to be 50 cms?

Option A: 187

Option B: 476

Option C: 200

Option D: 208

Option E: 276

Ex Output:
Option C

Ex Input:
Question: If the ratio of a to b is 2 to 3 and the ratio of b to c is 1 to 5, what is the ratio of a to c?

Option A: 4/15

Option B: 1/3

Option C: 2/15

Option D: 4/5

Option E: 7/6

Ex Output:
Option C

Ex Input:
Question: A train 200 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is?

Option A: 28

Option B: 50

Option C: 77

Option D: 22

Option E: 12

Ex Output:
Option C