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: If the ratio of boys to girls in a class is B and the ratio of girls to boys is G; then 5 (B + G) is ?

Option A: Equal to 3

Option B: Less than 5

Option C: More than 5

Option D: Less than 1/5

Option E: none of these
[A]: Option A

[Q]: Question: Rob traveled a distance of 30 km, covering the first 10 km in x minutes, the next 10 km in y minutes and the last 10 km in z minutes. If he totally took 3y minutes to cover the whole distance, then which of the following cannot be true? Assume x , y and z are different.

Option A: z=3x

Option B: x=3z

Option C: y=2x

Option D: x=2y

Option E: y=3x
[A]: Option D

[Q]: Question: How many paying stones, each measuring 2 1/2 m * 2 m are required to pave a rectangular court yard 30 m long and 16 1/2 m board?

Option A: 99

Option B: 86

Option C: 21

Option D: 26

Option E: 11
[A]:
Option A