This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mental Retardation, Subject name: Psychiatry
[{'content': 'Nowadays Down syndrome is referred to as: \nSelect and explain. \nA. Submental disorder, B. Oligophrenia, C. Madness, D. Mentally unstable', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. a. Submental disorderMajority of children with Down syndrome function in mild to moderate range of mental retardation.Down syndrome/Trisomy 21:Genetic disorder caused by presence of all or part of a third copy of chromosome 21.Typically associated with physical growth delays, characteristic facial features and mild to moderate intellectual disability.', 'role': 'assistant'}]