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: Medicine
Cardiac abnormality seen with Noonan's syndrome is: 
Select and explain. 
A. VSD, B. ASD, C. Pulmonary stenosis, D. Coarctation of aoa
C: Pulmonary stenosis
Answer: C: Pulmonary stenosis 
Explanation: Answer is C (Pulmonary stenosis) Pulmonary stenosis is the most common cardiac abnormality in Noonan's syndrome. Turner's syndrome Most common cardiac defect associated is Coarctation of aoa Bicuspid aoic valve Noonan's syndrome Most common cardiac defect associated is Pulmonary valvular stenosis (most common) Hyperophic cardiomyopathy ASD