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: A, B, C are three consecutive positive integers (A>B>C). What is the value of the expression 2A +B +2C?

 Option A: 6A+7.

 Option B: 5A+1.

 Option C: 5A-5.

 Option D: 6A-5.

 Option E: 6A-7.
[A]: Option C


[Q]: Question: A man can do a piece of work in 5 days, but with the help of his son he can do it in 3 days. In what time can the son do it alone ?

 Option A: 13/2

 Option B: 19/2

 Option C: 21/2

 Option D: 15/2

 Option E: None
[A]: Option C


[Q]: Question: Two students appeared at an examination. One of them secured 9 marks more than the other and his marks was 56% of the sum of their marks. What are the marks obtained by them?

 Option A: 42, 33

 Option B: 41, 33

 Option C: 42, 35

 Option D: 41, 35

 Option E: 41, 37
[A]:
Option A