This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunity, Subject name: Pathology
HIV affects? 
Select and explain. 
A. B-cells, B. Helper T cells, C. Suppressor T-cells, D. Cytotoxic T-cells
B: Helper T cells
Answer: B: Helper T cells 
Explanation: Ans. (b) Helper T cells(Ref: Robbins 9th/pg 246-249)gp120 receptors on HIV binds to host cell receptors (CD4) on QT-Lymphocytes (helper T cells)MacrophagesDendritic cellsOther Antigen presenting cells