This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Non communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Most common cancer world wide - \nSelect and explain. \nA. Lung, B. Prostate, C. Liver, D. Kidneny', 'role': 'user'}, {'content': "Answer: A \nExplanation: <p> Most common cancer among world is lung cancer. Reference:Park's textbook of preventive and social medicine,K.Park,23rd edition,page no:382.<\\p>", 'role': 'assistant'}]