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

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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

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