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 is not a feature of Edwards&; syndrome 
Select and explain. 
A. Simian crease, B. Micrognathia, C. Mental retardation, D. Congenital hea defects
A: Simian crease
Answer: A: Simian crease 
Explanation: Features of Edwards syndrome are Prominent occiput, Mental retardation, Micrognathia, Low set ears, sho neck, overlapping fingers, Congenital hea defects, exomphalos, Renal malformations, Limited hip abduction, Rocker-bottom feet.The simian crease is seen in Downs syndromeRobbins 9e pg: 162