This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Social science, Mental health & Genetics, Subject name: Social & Preventive Medicine
[{'content': 'The incidence of mental illness is the maximum if the causal factors affect a paicular period - \nSelect and explain. \nA. Perinatal period, B. First five years of life, C. School age, D. Adolescence', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The incidence of mental illness is the maximum if the causal factors affect a paicular period of first five years of life crucial points in the life cycle of human being which are impoant from the view of mental health are prenatal period, first five years of life, school child , adolescence, old age. ref ;(page no;832)23rd edition of PARK&;s textbook of Preventive and Social medicine', 'role': 'assistant'}]