This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Non essential amino acids are not: 
Select and explain. 
A. Used by the body., B. Forming part of the proteins., C. Required in the diet., D. Absorbed in the intestine.
C: Required in the diet.
Answer: C: Required in the diet. 
Explanation: None