You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

Q: Question: The radius of a semi circle is 6.3 cm then its perimeter is?

 Option A: 32.9

 Option B: 32.4

 Option C: 32.2

 Option D: 32.1

 Option E: 32.7

A: Option B
****
Q: Question: man buys an article for 10% less than its value and sells it for 10% more than its value. His gain or loss percent is?

 Option A: 12

 Option B: 76

 Option C: 26

 Option D: 20

 Option E: 12

A: Option D
****
Q: Question: If x/4 + 24/x = 5, what are the values of 2x - 7?

 Option A: 8 and 9

 Option B: 8 and 24

 Option C: 17 and 21

 Option D: 12 and 29

 Option E: 17 and 9

A:
Option E
****