**Concept: The question tests on the ability to solve a Geometry basic problem**

**Solution:**

2 ways of going about this

Method 1: x = 180 - 110 = 70 (Sum of angles on a straight line = 180)

Therefore 70 + 30 + y = 180 (Sum of angles of a triangle = 180)

y = 80

Method 2: Any Exterior angle of a triangle = Sum of opposite interior angles

110 = 30 + y

y = 80

Option D