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 mixture contains alcohol and water in the ratio 4 : 3. If 5 litres of water is added to the mixture, the ratio becomes 4: 5. Find the quantity of alcohol in the given mixture

Option A: 15 litres

Option B: 10 litres

Option C: 30 litres

Option D: 22 litres

Option E: 8 litres

Ex Output:
Option B

Ex Input:
Question: Look at this series: 8, 43, 11, 41, __, 39, 17, ... What number should fill in the blank?

Option A: 22

Option B: 33

Option C: 14

Option D: 16

Option E: 18

Ex Output:
Option C

Ex Input:
Question: A and B can do a piece of work in 10 days, while B and C can do the same work in 15 days and C and A in 25 days. they started working together, after 4 days A left. After another 4 days B left. In how many days C can finish the remaining work?

Option A: 16

Option B: 32

Option C: 64

Option D: 96

Option E: None of These

Ex Output:
Option D