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
In diagnosis of AIDS, criteria include the following except -a) CD4 <200b) CD8 < 500c) CD 4 : CD 8 = 1d) Presence of any of the opportunistic infections tuberculosis,pneumosystic carinii, cytomegaloviruse) Western blot is positive 
Select and explain. 
A. ab, B. bc, C. acd, D. bce
D: bce
Answer: D: bce 
Explanation: None