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': 'Gross National Product - capital we consume \nSelect and explain. \nA. Net National product, B. Gross Domestic product, C. Gross National income, D. Net Domestic product', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]