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
Hypertrophy is a type of 
Select and explain. 
A. Cell injury, B. Cellular adaptation, C. Carcinoma, D. Cell aging
B: Cellular adaptation
Answer: B: Cellular adaptation 
Explanation: Physiological adaptive responses include: 

Hypertrophy - increase in cell size 
Hyperplasia - increase in the number of cells 
Atrophy - decrease in cell size and number 
Metaplasia - reversible replacement of one cell type by another differentiated cell type