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
Which one of the following is not a feature of DiGeorge syndrome 
Select and explain. 
A. Congenital heart defects, B. Abnormalities of palate, C. Hypocalcemia, D. Rocker bottom feet
D: Rocker bottom feet
Answer: D: Rocker bottom feet 
Explanation: Rocker bottom feet is a feature of Edward and Patau syndrome.