Given below are two statements: one is labelled Assertion (A) and other is labelled Reason (R).
Assertion (A): Carbon dioxide is a waste product of respiration that must be eliminated from the human body.
Reason (R): An excessive amount of CO₂ produces acidity that can be toxic to cells.
In the light of above statements, choose the correct answer from the options given below.

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Both (A) and (R) are true and (R) is the correct explanation of (A).

Both (A) and (R) are false.

(A) is true but (R) is false.

Both (A) and (R) are true but (R) is not the correct explanation of (A).

answer is A.

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Detailed Solution

Assertion (A) is correct: Carbon dioxide (CO₂) is indeed a waste product of cellular respiration in the human body, and it needs to be eliminated to maintain proper physiological balance.
Reason (R) is correct and provides the correct explanation for (A): An excessive amount of CO₂ can lead to a condition known as respiratory acidosis. When CO₂ dissolves in water (including the blood), it forms carbonic acid (H₂CO₃), which can disrupt the body's pH balance and make the environment more acidic. This increased acidity can indeed be toxic to cells and interfere with their normal functioning. Therefore, the excessive accumulation of CO₂ does have the potential to be harmful due to the resulting disturbance in pH.
So, both the assertion and the reason are correct, and the reason provides the explanation for why the assertion is true.

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