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: given that p is a positive even integer with a positive units digit, if the units digit of p ^ 3 minus the units digit of p ^ 2 is equal to 0, what is the units digit of p + 4 ?
Options: a. 7, b. 8, c. 10, d. 11, e. 12

A: c
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Q: Problem: a shopkeeper sells 500 metres of cloth for rs. 18000 at a loss of rs. 5 per metre. find his cost price for one metre of cloth ?
Options: a. 12, b. 27, c. 29, d. 50, e. 41

A: e
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Q: Problem: a student appeared in the mock cat. the test paper contained 3 sections namely qa, di and va. the percentage marks in all va was equal to the average of percentage marks in all the 3 sections. coincidentally, if we reverse the digit of the percentage marks of qa we get the percentage marks of di. the percentage marks in va scored by student could be :
Options: a. 81, b. 48, c. 66, d. 69, e. none of these

A:
c
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