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
The decrease in cell size refers to 
Select and explain. 
A. Atrophy, B. Metaplasia, C. Hyperplasia, D. Hypertrophy
A: Atrophy
Answer: A: Atrophy 
Explanation: Shrinkage in the size of the cell by the loss of cell substance is known as atrophy
◆ Although atrophied cells have diminished its function, they are not dead