This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetic and genetic disorders, Subject name: Pediatrics
Which one of the following is a distinguishing feature of Edward&;s syndrome 
Select and explain. 
A. Hypotonia, B. Hypotelorism, C. Holoprosencephaly, D. Rocker bottom feet
D: Rocker bottom feet
Answer: D: Rocker bottom feet 
Explanation: ), Edwards syndrome ( Reference: GHAI Essential pediatrics, 8th edition