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.

[Q]: Problem: how many integers are between 6 and 74 / 5, inclusive ?
Options: a. 4, b. 5, c. 6, d. 7, e. 9
[A]: e


[Q]: Problem: a sells a bicycle to b and makes a profit of 50 %. b sells the same bicycle to c at a profit of 25 %. if the final s. p. of the bicycle was rs. 225, find out the cost price of the bicycle for a.
Options: a. 237, b. 126, c. 971, d. 611, e. 120
[A]: e


[Q]: Problem: the volume of water inside a swimming pool doubles every hour. if the pool is filled to its full capacity within 8 hours, in how many hours was it filled to one quarter of its capacity ?
Options: ['a. 2', 'b. 4', 'c. 5', 'd. 6', 'e. 7']
[A]:
d