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Plz solve this question.. Plz solve it fast.. 20. Which one out ofA—D given below correctly represents the structural formula of the basic amino acid? NH2 CH2 CH2 OH NY-12 CH20H NH2 H—C—COOH CH2 CH2 OH CH2 CH2 CH2 NH2 CH2 CH2 NH2 [AIPMT (Prelims)-20121

Answer is B as-

The R-group (side chain) is what makes each amino acid unique. Each of the 20 amino acids has a different side chain structure. Side chains contain mainly hydrogen, carbon, and oxygen atoms. Some amino acids have sulfur or nitrogen atoms in their R-groups.
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Answer is B because CH2OH Represent serine which is basic amino group
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