Answer: 5 billion.
- A 4 billion
- B 5 billion
- C 6 billion
- D 7 billion
Correct answer: B. 5 billion
Explanation: World Population Day is observed on July 11 to mark the approximate date in 1987 when the world population reached 5 billion (the Day of Five Billion). It raises awareness about population-related issues.
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.