This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'All of the following phrases concerning manic-depressive psychosis are true except \nSelect and explain. \nA. Younger age of onset in women, B. Female: Male ratio of 2:1, C. Predisposition of aggressive women with masculin, D. Diagnosis reliable across geographic areas', 'role': 'user'}, {'content': 'Answer: B \nExplanation: M:F= 1:1', 'role': 'assistant'}]