If the sum of ages of A and B is 12 years more than the sum of ages of B and C then by how many years is A older than C?

16 years

12 years

14 years

None of these

Let's denote the ages of A, B, and C as a, b, and c respectively.

Given: a + b = 12 + b + c

Simplifying: a = 12 + c

So, A is 12 years older than C.