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 of the following statement is/are true about dengue \nSelect and explain. \nA. ↑ Haematocrit, B. ↓ platelet, C. + tourniquet test, D. Vector Aedes aegypti usually bite during day time', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]