This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Treatment for asymptomatic HIV is done when CD4 count is below \nSelect and explain. \nA. 200, B. 350, C. 400, D. 500', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Under the revised guidelines the treatment of AIDS patients with respect to oppounistic infection has undergone a change with HAA begin intiated at a threshold of CD4 count less than 350 cells/cu.mm instead of previous 200 cells / cu .mm', 'role': 'assistant'}]