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: Pediatrics
All of the following may occur in Noonan's syndrome, EXCEPT: 
Select and explain. 
A. Hyperophic cardiomyopathy, B. Cryptorchidism, C. Cryptorchidism, D. Autosomal dominant transmission
C: Cryptorchidism
Answer: C: Cryptorchidism 
Explanation: In females with Noonan syndrome normal sexual maturation usually occurs but is delayed 2 yr on average, and premature ovarian failure has been repoed. Ref: Kliegman, Behrman, Jenson, Stanton (2008), Chapter 81, "Cytogenetics", In the book, "NELSON TEXTBOOK OF PEDIATRICS", Volume 1, 18th Edition, New Delhi, Pages 514-15.