Assertion (A): Plants help to purify air by taking in carbon dioxide.
Reason (R): Carbon dioxide is used in photosynthesis during daytime
A
A is true and R is false.
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B
A is false and R is true.
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C
Both A and R are true and R is the correct explanation for A.
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D
A and R both are true but R is not the correct explanation for A.
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Solution
The correct option is C Both A and R are true and R is the correct explanation for A. Animals exhale carbon dioxide during breathing. Plants take up that carbon dioxide during photosynthesis and release oxygen during the daytime . This helps in decreasing the amount of carbon dioxide from the air, while increasing the concentration of oxygen.