- A Bacterium
- B Protozoan
- C Virus
- D Fungus
Correct answer: C. Virus
Explanation: Hepatitis B is caused by the Hepatitis B Virus (HBV). It can be transmitted sexually, through blood, and from mother to child during birth.
Concept context
Understand reproductive health, family planning, contraception methods, STIs, population control, and assisted reproductive technologies.