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: Unknown
A pregnant uterus is an example of: 
Select and explain. 
A. Metaplasia, B. Dysplasia, C. Atrophy, D. Hypertrophy
D: Hypertrophy
Answer: D: Hypertrophy 
Explanation: Ans. (d) HypertrophyRef: Robbing pathology 9th ed. /34* Hypertrophy refers to an increase in the size of cells,that results in an increase in the size of the affected organ.* The most common stimulus for hypertrophy of muscle is increased workload.* A gravid uterus is an example of hypertrophy and hyperplasia both but mainly hypertrophy.* Robbin's 9th ed. /34 states: "The massive physiologic growth of the uterus duringpregnancy is a good example of hormone-induced enlargement of an organ that results mainly from hypertrophy of muscle fibers"* Breast enlargement at puberty and at pregnancy is also an example of hypertrophy and hyperplasia both.