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: Social & Preventive Medicine
Which of the following protein is biologically complete? 
Select and explain. 
A. Egg, B. Milk, C. Both of the above, D. None of the above
C: Both of the above
Answer: C: Both of the above 
Explanation: A protein is said to be biologically complete if it contains all essential amino acids in amount corresponding to human needs. Examples are milk and egg. Ref: Park 22nd edition, page 564.