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
Not true about Edward syndrome 
Select and explain. 
A. VSD is the most common congenital heart defect, B. Rockerbottom foot, C. Respiratory failure, D. Normal IQ
D: Normal IQ
Answer: D: Normal IQ 
Explanation: intellectual disability is a feature of Edward syndrome.