Correct option is (d) Epstein-Barr virus (EBV virus)
Easiest explanation: Epstein-Barr virus or EBV is also known as Herpes virus 4. It causes an infection called Mononucleosis, which is a contagious disease. Since the virus is present in the saliva of the host, it can be contracted by a healthy individual by kissing or eating from the same utensils.