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: Surgery
In what age group seminoma are common 
Select and explain. 
A. 5-6th decade of life, B. 4-5th decade of life, C. 3-4th decade of life, D. 6-7th decade of life
C: 3-4th decade of life
Answer: C: 3-4th decade of life 
Explanation: Seminomas are present in 3rd to 4th decade of life.
Seminomas have best prognosis.