This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
In diagnosis of AIDS, criteria include the following except - 
Select and explain. 
A. CD4<200, B. CD8<500, C. CD4 : CD8 = 1, D. Presence of any of the oppounistic infections tuberculosis, pneumosystic carinii, cytomegalovirus
B: CD8<500
Answer: B: CD8<500 
Explanation: CD4<200,CD4-CD8 ratio is reversed&presence of oppounistic infection. REF:MICROBIOLOGY ANANTHA NARAYANAN NINTH EDITION PAGE.577