The correct option is B Herpes
Genital Herpes is an STD. Sexually transmitted diseases (STDs) are infections that are passed from one person to another through sexual contact. Herpes is caused by HSV (Herpes simplex virus). This virus affects the genitals, the cervix, and skin.
Cancer is a non-infectious disease.
Myocarditis is a disease marked by inflammation and damage of the heart muscle. There are many causes of myocarditis, including viral infections, autoimmune diseases, environmental toxins, and adverse reactions to medications.
Diphtheria is an infection caused by the bacterium Corynebacterium diphtheriae, and is not an STD.