The total age of A and B is 13 years more than the total age of B and C. C is how many year younger than A
Choose the correct choice from the following answers:	A) 11	B) 12	C) 13	D) 14	E) 15

Rationale: "explanation : given that a + b = 13 + b + c = > a – c = 13 + b – b = 13 = > c is younger than a by 13 years answer : option c"
Answer: C