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
[{'content': 'Which is not a feature of Edwards&; syndrome \nSelect and explain. \nA. Simian crease, B. Micrognathia, C. Mental retardation, D. Congenital hea defects', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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', 'role': 'assistant'}]