Which of the following are essential amino acids (NCERT list)?

ATyrosine
BAspartic acid
CLeucine
DTryptophan

Answer: C, D

The essential amino acids are valine, leucine, isoleucine, arginine, lysine, threonine, methionine, histidine, phenylalanine and tryptophan. Aspartic acid and tyrosine are not in this list, so they are non-essential.

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