This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, 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: * Hyperophy - increase in cell size * Hyperplasia - increase in 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 Reference robbins page no 2.