Question

Let ABC be a triangle. Let A be the point (1, 2), y = x is the perpendicular bisector of AB and x – 2y + 1 = 0 is the angle bisector of ∠C. If equation of BC is given by ax + by – 5 = 0, then a + b is

(a) 1

(b) 2

(c) 3

(d) 4

Answer 1

Correct option is (b) 2