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Asked: January 17, 20252025-01-17T08:29:23+00:00 2025-01-17T08:29:23+00:00In: Railway NTPC

Lichen is an organism that monitors?

A) Air pollution
B) Water pollution
C) Soil fertility
D) Radiation levels

Answer: A) Air pollution

Explanation: Lichens are sensitive to air pollutants, especially sulfur dioxide, and are used as bioindicators of air quality.