Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.

Input: Consider Input: Problem: what is the least number of squares tiles required to pave the floor of a room 15.17 m long and 9.02 m broad ?
Options: ['a. 814', 'b. 266', 'c. 287', 'd. 999', 'e. 661']

Output: a


Input: Consider Input: Problem: 2,7, 17,3, 11,19, 5,13, __
Options: a. 20, b. 21, c. 22, d. 23, e. 24

Output: d


Input: Consider Input: Problem: a jar contains a mixture of ab in the ratio 3: 2. when 20 l of mixture is replaced with liquid b, ratio becomes 2: 3. how many liters of liquid a was present in mixture initially.
Options: a. 12, b. 15, c. 16, d. 20, e. 36


Output: e