Assertion: $D N A$ is called as deoxyribonucleic acid.
Reason: Deoxyribose sugar has one more $H$ atom at second carbon in the ring.

A and R are correct and R is correct explanation of A.

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A and R are correct but R is not the explanation of A.

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A is true, R is false.

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A is false, R is true.

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Solution

The correct option is A A and R are correct and R is correct explanation of A.
DNA is called as 'Deoxyribonucleic acid' as it has one more $H$ atom at second carbon in the ring.
This $H$ is the replacement of the hydroxyl group.
Thus, A and R are correct and R is correct explanation of A.

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Assertion: DNA is called as deoxyribonucleic acid.Reason: Deoxyribose sugar has one more H atom at second carbon in the ring.

The correct option is A A and R are correct and R is correct explanation of A.DNA is called as 'Deoxyribonucleic acid' as it has one more H atom at second carbon in the ring. This H is the replacement of the hydroxyl group.Thus, A and R are correct and R is correct explanation of A.

Assertion: $D N A$ is called as deoxyribonucleic acid.
Reason: Deoxyribose sugar has one more $H$ atom at second carbon in the ring.

The correct option is A A and R are correct and R is correct explanation of A.
DNA is called as 'Deoxyribonucleic acid' as it has one more $H$ atom at second carbon in the ring.
This $H$ is the replacement of the hydroxyl group.
Thus, A and R are correct and R is correct explanation of A.