Answer: Chlamydia trachomatis (bacterium).
- A Chlamydia trachomatis (bacterium)
- B Chlamydia vaginalis (protozoan)
- C Chlamydia herpes (virus)
- D Chlamydia pallidum (spirochete)
Correct answer: A. Chlamydia trachomatis (bacterium)
Explanation: Chlamydia is caused by Chlamydia trachomatis, an obligate intracellular bacterium. It is one of the most common STIs and is often asymptomatic.
Contraceptive methods span a spectrum from temporary/natural to permanent/surgical; condoms stand out as the only method offering STI protection alongside contraception.
Concept context
Understand reproductive health, family planning, contraception methods, STIs, population control, and assisted reproductive technologies.