This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: VBDs, Arboviral & Viral Infections, Surface Infections, Subject name: Social & Preventive Medicine
[{'content': 'Which dengue serotype has higher risk of causing Dengue hemorrhagic fever as Secondary infection? \nSelect and explain. \nA. DENV-1, B. DENV-2, C. DENV-4, D. DENV-3', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Secondary infection with dengue serotype 2 or multiple infection with different serotypes lead to severe form dengue DHF/DSS.', 'role': 'assistant'}]