Which discovery is attributed to phoebus levene? extraction and observation of dna identification of ribose and deoxyribose recognition of rna as dna’s messenger construction of an accurate dna model

The right answer is B (the second one, ribose and deoxyribose).

Phoebus Aaron Theodore Levene was a Lithuanian biochemist emigrating to the United States. Levene studied DNA extensively and found that it contains adenine, guanine, thymine, cytosine, deoxyribose and phosphate group. He discovered ribose in 1909 and deoxyribose in 1929 in the Rockefeller Institute.

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