Assertion: D (+) -Glucose is dextrorotatory in nature. Reason: D represents its dextrorotary nature. A. Assertion and reason both are correct statements and reason is correct explanation for assertion. B. Assertion and reason both are correct statements but reason is not correct explanation for assertion. C. Assertion is correct statement but reason is wrong statement. D. Assertion is wrong statement but reason is correct statement.

Assertion: The bond between adenine and thymine is stronger than the bond between Cytocine and guanine. Reason: Cytosine and guanine have a triple hydrogen bond while adenine and thymine have a double hydrogen bond A. Assertion and reason both are correct statements and reason is correct explanation for assertion. B. Assertion and reason both are correct statements but reason is not correct explanation for assertion. C. Assertion is correct statement but reason is wrong statement. D. Assertion is wrong statement but reason is correct statement.

Assertion: Amino acids in protein remain intact even when it is denatured. Reason: The primary structure of protein is broken to give individual aminoacids on denaturation. A. Assertion and reason both are correct statements and reason is correct explanation for assertion. B. Assertion and reason both are correct statements but reason is not correct explanation for assertion. C. Assertion is correct statement but reason is wrong statement. D. Assertion is wrong statement but reason is correct statement.

Assertion: Glycine is not optically optically active. Reason: There is no asymmetrical carbon in glycine to make it chiral. A. Assertion and reason both are correct statements and reason is correct explanation for assertion. B. Assertion and reason both are correct statements but reason is not correct explanation for assertion. C. Assertion is correct statement but reason is wrong statement. D. Assertion is wrong statement but reason is correct statement.