M.Sc. Bio-Physics (PU-CET P.G) 2019 Panjab University Entrance Exam With Answers

Practice Mode:
47.

Ozone hole refers to

A: Hole in ozone layer
B: Decrease in the ozone layer in troposphere
C: Decrease in thickness of ozone layer in stratosphere
D: Increase in the thickness of ozone layer in troposphere

The answer is: C