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
Example of physiological atrophy is 
Select and explain. 
A. Senile atrophy, B. Disuse atrophy, C. Post pregnancy uterine atrophy, D. All of the above
C: Post pregnancy uterine atrophy
Answer: C: Post pregnancy uterine atrophy 
Explanation: Answer- C. Post pregnancy uterine atrophyAtrophy is reduced size of an organ or tissue resulting from a decrease in cell size and number.Atrophy may be1. Physiologicalatrophy of notochord and thyroglossal duct during fetal developmentDecrease in uterus size after delivery2. Pathological