This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'Edwards syndrome is \nSelect and explain. \nA. Trisomy 21, B. Trisomy 18, C. Trisomy l3, D. 5P', 'role': 'user'}, {'content': 'Answer: B \nExplanation: TRISOMY 18: EDWARDS SYNDROME Characterised by Prominent occiput Mental retardation Micrognathia Sho neck Overlapping fingers Congenital hea defects Renal malformations Limited hip abduction Low set ears (Robbins Basic Pathology,9th edition,pg no. 238)', 'role': 'assistant'}]