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: Pediatrics
[{'content': 'A  child has been brought to OPD with mental retardation. On examination, microcephaly, triangular face, fifth finger clinodactyly is found. What is the most probable diagnosis \nSelect and explain. \nA. Russel Silver Syndrome, B. Angelman Syndrome, C. Treacher Collin Syndrome, D. Pierre - Robin Syndrome', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Features of Russel Silver Syndrome\n\nTriangular face\nMicrocephaly\nShort stature\nLow birth weight\nFifth finger clinodactyly.', 'role': 'assistant'}]