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: Pathology
Necrosis of cells is due to : 
Select and explain. 
A. Ca2+ efflux cell, B. Fat deposition in cells., C. Water imbibition in cells., D. Enzymatic digestion.
D: Enzymatic digestion.
Answer: D: Enzymatic digestion. 
Explanation: • Necrosis: It refers to morphological changes that follow cell death in living tissues.
• These morphological changes are the result of 2 concurrent processes.
1. Enzymatic digestion.
2. Denaturation of proteins.
• The enzymes used in the process are derived from 2 sources:
1. From the lysosomes of the dead cells themselves (Autolysis).
2. From the lysosomes of immigrant leucocytes (Heterolysis).