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
Incidence of undescended testis in term infants is: 
Select and explain. 
A. <5%, B. <1%, C. 8%, D. 10%
A: <5%
Answer: A: <5% 
Explanation: The incidence of undescended testes is approximately 30% in preterm infants and 1 to 3% in term infants. Ref: Schwaz's principle of surgery 9th edition, chapter 39.