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Lichens indicate pollution by - Practice (English) | ObjectiveMcq
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Biology
Botany
Lichens indicate pollution by...
Botany
Biology
Easy
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Lichens indicate pollution by
A
O
3
O_3
O
3
B
S
O
2
SO_2
S
O
2
C
N
O
2
NO_2
N
O
2
D
CO.
Correct Answer:
(B)
S
O
2
SO_2
S
O
2
Explanation:
S
O
2
SO_2
S
O
2
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