| Column-I | Column-II |
| A. Oxygen | (p) Consumed by plants and animals during photosynthesis |
| B. Carbon dioxide | (q) Produced by animals during respiration |
| C. Atmosphere | (r) Animals that live under water |
| D. Aquatic animals | (s) Thin layer of air that surrounds the earth |
A) \[A\to (p);B\to (q);C\to (r);D\to (s)\]
B) \[A\to (q);B\to (p);C\to (s);D\to (r)\]
C) \[A\to (p);B\to (q);C\to (s);D\to (r)\]
D) \[A\to (q);B\to (p);C\to (r);D\to (s)\]
Correct Answer: B
Solution :
\[A\to (q);B\to (p);C\to (s);D\to (r)\]
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