Correct Answer: D

Rationale: Success in utilizing the primary health care approach is indicated by the sustainability of health programs based on the community's development level. This ensures that essential health services can be maintained at all stages of community development, reflecting the core principles of primary health care.

Correct Answer: C

Rationale: The principle of freedom of choice in family planning programs emphasizes providing couples with adequate information about the different methods available. This enables them to make informed decisions based on their preferences and needs. By ensuring couples have access to comprehensive information, they can freely choose the family planning method that best suits their circumstances, promoting autonomy and informed decision-making.

Correct Answer: D

Rationale: Individuals who have had a delivery within the past 15 months should be considered special targets for family planning because the ideal birth spacing is at least two years. By waiting two years (15 months post-delivery + 9 months of pregnancy), the individual can give their body enough time to recover and reduce potential health risks associated with closely spaced pregnancies.

Correct Answer: C

Rationale: The vastus lateralis muscle is the preferred site for intramuscular injections in infants due to its larger muscle mass and fewer major nerves and blood vessels, reducing the risk of injury or adverse effects.

Correct Answer: B

Rationale: The sex ratio is calculated as the number of males for every 100 females in the population. To find the sex ratio, divide the number of males by the number of females and multiply by 100. In this case, (35,299,000 / 34,968,000) * 100 ≈ 100.94:100. Therefore, the correct answer is B, indicating that there were approximately 100.94 males for every 100 females in the Philippines in 1995.