Q.

DNA consists of symbols sugars, phosphate units and four specis nitrogenous basis
(a)Cytosine, Guanine, Thymine and Uracil
(b)Adenine, Cytosine, Thymine and Uracil
(c)Adenine, Cytosins, Guanine and Thymine
(d)Adenine, Guanine, Thymine and Uracil Right sign
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