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.

[EX Q]: Question: The length of a room is 7 m and width is 4.75 m. What is the cost of paying the floor by slabs at the rate of Rs. 900 per sq. metre.

 Option A: 25650

 Option B: 25750

 Option C: 26550

 Option D: 26750

 Option E: 29925
[EX A]: Option E

[EX 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
[EX A]: Option B

[EX Q]: Question: Husband and wife having average age of 26 years at their marriage time. After four years they have a two year old child. The average age of the family now

 Option A: 20.66 years

 Option B: 23 years

 Option C: 28.5 years

 Option D: 29.3 years

 Option E: None of these
[EX A]:
Option A