instruction:
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.
question:
Problem: the average of 11 10 prime numbers which are odd is ?
Options: a. 17.72, b. 18.52, c. 19.63, d. 16.53, e. 15.63
answer:
a

question:
Problem: a man bought an article and sold it at a gain of 5 %. if he had bought it at 5 % less and sold it for re 5 less, he would have made a profit of 10 %. the c. p. of the article was
Options: a. 960, b. 980, c. 900, d. 970, e. 1000
answer:
e

question:
Problem: a number is said to be prime saturated if the product of all the different positive prime factors of t is less than the square root of t. what is the greatest two digit prime saturated integer ?
Options: a. 99, b. 98, c. 97, d. 96, e. 95
answer:
d