Question

how many known stis exist today?
a. less than 5
b. less than 10
c. less than 20
d. more than 20
please select the best answer from the choices provided.

Explanation:

There are more than 20 known sexually - transmitted infections (STIs). Some common ones include chlamydia, gonorrhea, syphilis, HIV/AIDS, herpes, HPV (which has many types), trichomoniasis, and others.

Answer:

D. more than 20