This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection, Subject name: Medicine
An asympromatic adult with CD4 count of 230/L falls under which category of CDC classification? 
Select and explain. 
A. A1, B. A2, C. B2, D. C1
B: A2
Answer: B: A2 
Explanation: CD4 + T Cell Categories A Asymptomatic, Acute (Primary) HIV or PGL B Symptomatic,Not A or C Conditions C AIDSIndicatorConditions >500/mL A1 B1 C1 200-499/mL A2 B2 C2 <200/mL A3 B3 C3 (Harrison's Principles of internal medicine, 20th edition, page 1506)