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
True about denaturation of protein is all except? 
Select and explain. 
A. Unfolding occurs, B. Disruption of secondary structure occurs, C. Sequence of amino acids remain the same, D. Biological activity is retained
D: Biological activity is retained
Answer: D: Biological activity is retained 
Explanation: None