This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics, Subject name: Pathology
[{'content': 'The following feature is not common in 22q 11.2 deletion syndrome \nSelect and explain. \nA. Mental retardation, B. Schizophrenia, C. ADHD, D. Congenital heart defects', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Mental retardation(Ref: Robbins 9th/pg 163)Individuals with the 22qll.2 deletion syndrome have high risk for psychotic illnesses, such as schizophrenia (25% cases) and bipolar disorders.In addition, attention deficit hyperactivity disorder is seen in 30-35% of affected children.', 'role': 'assistant'}]