Which one of the following food materials contains all essential amino acids?

Correct answer: (d) more than one of the above

Explanation

The body needs 20 amino acids; 9 are essential (Lysine, Histidine, Threonine, Methionine, Valine, Isoleucine, Leucine, Phenylalanine, Tryptophan) and must come from diet.

Both milk and egg are complete proteins supplying all essential amino acids, while rice lacks lysine.

Since more than one option qualifies, the answer covers both animal-source proteins.