If a(a - 4) = 12 and b(b -4) = 12, where a ≠ b, then a + b =
Choose the correct choice from the following answers: A) − 48 B) − 5 C) 4 D) 46 E) 48

Rationale: i . e . if a = 6 then b = - 2 or if a = - 2 then b = 6 but in each case a + b = - 2 + 6 = 4 answer : option c
Answer: C