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': 'Mosquitoes decrease as height increases ? \nSelect and explain. \nA. Positive correlation, B. Negative correlation, C. Bidirectional, D. Zero', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Negative correlation o This is a negative correlation, i.e. when height increases the mosquitoes decrease.", 'role': 'assistant'}]