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
What is hyperplasia 
Select and explain. 
A. Decrease in cell size, B. Increase in cell size, C. Increase in cell number, D. Decrease in cell number
C: Increase in cell number
Answer: C: Increase in cell number 
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
 Hyperplasia is common in cells capable of replication namely labile cells / stable cells or stem cells