Angle between the internal bisectors of two angles of a triangle ∠B and ∠C is 120°, then ∠A is :

Answer: Option C

According to question,

Given : ∠BIC = 120°
∠BIC = 90° + $$\frac{1}{2}$$ ∠A
$$\frac{\angle A}{2}$$  = (120° - 90°)
$$\frac{\angle A}{2}$$  = 30°
∠A = 60°