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: Which of the following is greatest?

Option A: 1/10

Option B: 1/100

Option C: 1/1000

Option D: 1/10^9

Option E: 1/5

Output: Option E

Input: Consider Input: Question: A train covers a distance of 12 km in 10 min. If it takes 10 sec to pass a telegraph post, then the length of the train is?

Option A: 100

Option B: 110

Option C: 200

Option D: 130

Option E: 140

Output: Option C

Input: Consider Input: Question: IF
6= I
7= E
8= I
9= I
10=E
THEN 11=?

Option A: I

Option B: J

Option C: K

Option D: L

Option E: M
Output: Option D