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 an office, 20 percent of the workers have at least 5 years of service, and a total of 16 workers have at least 10 years of service. If 90 percent of the workers have fewer than 10 years of service, how many of the workers have at least 5 but fewer than 10 years of service?

Option A: 32

Option B: 64

Option C: 50

Option D: 144

Option E: 160

Output: Option A

Input: Consider Input: Question: A cow and horse are bought for Rs.2,00,000. The cow is sold at a profit of 20% and the horse is sold a t a loss of 10%. The overall gain is Rs.4000, the Cost price of cow?

Option A: 2 percent

Option B: 3

Option C: 4

Option D: 5

Option E: 6

Output: Option A

Input: Consider Input: Question: You buy a piece of land with an area of 100, how long is one side of the land plot?

Option A: 28

Option B: 29

Option C: 10

Option D: 31

Option E: 32
Output: Option C