## **Core Concept**
The question pertains to the demographic distribution of populations, specifically focusing on the percentage that infants constitute. Infants are typically defined as children in the first year of life. Understanding the proportion of infants in a population is crucial for public health planning, resource allocation, and epidemiological studies.

## **Why the Correct Answer is Right**
The correct answer, , indicates that infants make up a specific percentage of the population. Although the exact percentage can vary depending on the country, region, and time period due to factors like birth rates and population growth, a commonly cited figure for infants (0-1 year) in many populations is around . This percentage reflects the proportion of the population that is in the first year of life, which is a critical period for growth, development, and vulnerability to health issues.

## **Why Each Wrong Option is Incorrect**
- **Option A:** is incorrect because it suggests a significantly lower percentage than what is typically observed for infants in a population.
- **Option B:** is incorrect as it implies a much higher percentage than is generally accurate for the infant population.
- **Option D:** is incorrect because it represents an even higher percentage, which does not align with the usual demographic distribution.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that the infant mortality rate, which is the number of deaths of infants under one year of age per 1000 live births in a given year, is a critical indicator of a country's health status and socio-economic development. Infants are a vulnerable group, and their proportion in the population, along with their health outcomes, are closely monitored by public health officials.

## **Correct Answer:** .