Correct Answer: C

Rationale: Swaroop's index is a valuable statistic that reflects the health status of a community by indicating the proportion of deaths aged 50 years and above. A higher Swaroop's index signifies a greater proportion of individuals who lived at least 50 years before passing away. This metric provides insight into the overall health and longevity of a population, making it a more accurate reflection of community health compared to other mortality rates.

Correct Answer: B

Rationale: Under 5-year-old children are particularly susceptible to protein-energy malnutrition (PEM) because they have generally been weaned and often rely on others for food. This population may suffer from poor intrafamilial food distribution, contributing to their vulnerability.

Correct Answer: D

Rationale: To estimate the number of 1-4 year old children in a population, you can multiply the total population by the percentage of children in that age group. In this case, using the Philippine population composition as reference, which is about 11.5% for 1-4 year olds, the calculation would be 20,000 x 0.115 = 2,300 children.

Correct Answer: C

Rationale: Swaroop's index is a valuable statistic that reflects the health status of a community by indicating the proportion of deaths aged 50 years and above. A higher Swaroop's index signifies a greater proportion of individuals who lived at least 50 years before passing away. This metric provides insight into the overall health and longevity of a population, making it a more accurate reflection of community health compared to other mortality rates.

Correct Answer: D

Rationale: To describe the sex composition of the population, both the sex ratio and sex proportion can be utilized. The sex ratio provides a numerical comparison of the number of males to females in a population, while the sex proportion expresses the relative number or percentage of males and females in a given population. On the other hand, a population pyramid is a graphical representation that shows the age and sex distribution of a population. Therefore, any of these tools may be used to analyze and present the sex composition of a population.