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: Social & Preventive Medicine
[{'content': 'Optimal healthy life includes - \nSelect and explain. \nA. Moderate physical exercise, B. Sufficient nutrition, C. Mental peace, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Determinants of health \n\nFollowing determinants of health provide good health, optimal health or positive health.\n\nGenetic configuration\xa0→\xa0Genetic constitution of an individual can affect the health e.g. G-6-PD deficiency.\nLevel of development\xa0→\xa0Economic and social development helps to improve health status.\xa0\nLife style\xa0→\xa0Moderate physical activity, cessation of smoking and regular exercise prevent the occurence of CHD. Adequate nutrition, sound mind (mental peace) and enough sleep also promote health.\nEnvironment\xa0→\xa0Proper sanitation, adequate safe drinking water and low level of atmospheric pollution promote health.\nHealth infrastructure\xa0→\xa0If primary health care facilities are available in the vicinity and such facilities are utilized by population, the health of individuals and communities is bound to improve.', 'role': 'assistant'}]