Identify the essential amino acids from below : (A) Valine (B) Proline (C) Lysine (D) Threonine (E) Tyrosine
Choose the correct answer from the options given below :

Essential amino acids are those that cannot be synthesized by the human body and must be obtained from the diet.

The essential amino acids are: Valine, Leucine, Isoleucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, and Histidine.

Checking each option:

(A) Valine - Essential ✓

(B) Proline - Non-essential ✗

(C) Lysine - Essential ✓

(D) Threonine - Essential ✓

(E) Tyrosine - Non-essential (conditionally essential) ✗

The correct answer is Option 2: (A), (C) and (D) only.