This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Impoant Genetic Syndromes, Subject name: Pediatrics
[{'content': 'Child with bouts of laughter, what should be the possible diagnosis ? \nSelect and explain. \nA. Russel silver syndrome, B. Angelman syndrome, C. Prader willi syndrome, D. Fragile X syndrome', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ANGELMAN SYNDROM/Happy puppet syndrome Bouts of laughter, intellectual disability, cerebella ataxia and severe developmental delay, Malformations of the skull and facial bones, seizures RUSSELL SILVER SYNDROME - Sho stature , Triangular facies PRADER WILLI SYNDROME - Obesity, Feeding difficulty, Intellectual disabilities FRAGILE X SYNDROME as- XL dominant ,Elongated face, large ears, large testis', 'role': 'assistant'}]