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: If p and q are positive integers each greater than 1, and 17(p+1)=20(q+1), what is the least possible value of p+q?

Option A: 35

Option B: 42

Option C: 44

Option D: 46

Option E: none
Example Output: Option A

Example Input: Question: How many words can be formed by taking 4 letters at a time out of the letters of the word MATHEMATICS.

Option A: 2154

Option B: 2454.

Option C: 2254

Option D: 2354

Option E: 1245
Example Output: Option B

Example Input: Question: A dishonest milkman sells a 40 liter mixture of milk and water that contains milk and water in the ratio of 2:3. He takes out 20 liters of the mixture and replaces it with an equal amount of milk. He then takes out 20 liters of this new mixture and replaces it with an equal amount of water to create his final mixture. What is the ratio of milk and water in the final mixture?

Option A: 2:5

Option B: 3:5

Option C: 2:3

Option D: 3:2

Option E: 5:3
Example Output:
Option D