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.

Input: Consider Input: Question: In a company 200 persons, working 6 hours per day complete 1/3 rd of the work in 7 days. Employee number of additional persons, working 4 hrs per day, required to complete the remaining work in 15 days is :

Option A: 60

Option B: 80

Option C: 90

Option D: 70

Option E: 50

Output: Option B

Input: Consider Input: Question: A combustion reaction forms carbon dioxide. A carbon dioxide molecule contains one carbon and two oxygen atoms. If, over a period of 10 minutes, a combustion reaction creates 10,000 molecules of carbon dioxide then approximately how many more atoms of oxygen than carbon are created on average per minute?

Option A: 1,000

Option B: 500

Option C: 250

Option D: 50

Option E: 0

Output: Option A

Input: Consider Input: Question: A part of certain sum of money is invested at 9% per annum and the rest at 21% per annum, if the interest earned in each case for the same period is equal, then ratio of the sums invested is?

Option A: 4:2

Option B: 4:8

Option C: 7:3

Option D: 4:0

Option E: 4:9
Output: Option C