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: 10, 1000, 100000, 10000000....
Options: a. 100, 000,000, b. 1,000, 000,000, c. 1, 000,000, 000,000, d. 100, e. 1, 000,000

A: b
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Q: Problem: a train which has 430 m long, is running 45 kmph. in what time will it cross a person moving at 9 kmph in same direction ?
Options: a. 56 sec, b. 43 sec, c. 36 sec, d. 29 sec., e. 19 sec.

A: b
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Q: Problem: the salary of a typist was at first raised by 10 % and then the same was reduced by 5 %. if he presently draws rs. 4180. what was his original salary ?
Options: a. 2277, b. 2999, c. 4000, d. 2651, e. 1971

A:
c
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