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': 'Which one of the following was the major outcome of the famous Earth summit in Rio de Janeiro in 1992 – \nSelect and explain. \nA. Setting up of bio-safety standards, B. Global strategy for control of pandemics, C. Framework convention on climate change, D. Framework on strategies for sustainable development', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]