ABC is a triangle and the sides AB, BC and CA are produced to E, F and G respectively. If ∠CBE = ∠ACF = 130°, then the value of ∠GAB is :

Answer: Option A

We know that
⇒ Add of total exterior angle of a triangle (polygon) = 360°

⇒ So, 130° + 130° + x° = 360°
x° = 100°