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: Pathology
Causative agent of Infectious mononucleosis 
Select and explain. 
A. HIV, B. Hepatitis B, C. Herper Simplex, D. Epstein - Barr virus
D: Epstein - Barr virus
Answer: D: Epstein - Barr virus 
Explanation: Solution

Epstein - Barr virus (EBV) causes infectious mononucleosis
EBV nfect B lymphocytes by binding to CD21 (CR2) receptor