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
Apoptosis is: 
Select and explain. 
A. Single cell necrosis, B. Intracytoplasmic accumulation, C. Degenerative change, D. Neoplastic change in the cell
A: Single cell necrosis
Answer: A: Single cell necrosis 
Explanation: Apoptosis: 
Regulated mechanism of cell death that serves to eliminate unwanted and irreparably damaged cells, with the least possible host reaction, characterized by enzymatic degradation of proteins and DNA, initiated by caspases; and by rapid recognition and removal of dead cells by phagocytes.
Kumar V, Abbas AK, Aster JC. Robbins basic pathology. Elsevier Health Sciences; 2017. Page 41