## Core Concept
The ponderal index is a measure used to assess the leanness of a person, calculated as the ratio of weight to the cube of height. It is often expressed in units of grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³) when using the metric system. The formula for calculating the ponderal index is: Ponderal Index = (Weight in grams / Height in cm³) * 100.

## Why the Correct Answer is Right
To calculate the ponderal index for a child with a weight of 2000 g and a height of 50 cm, we substitute these values into the formula: Ponderal Index = (2000 g / (50 cm)³) * 100 = (2000 / 125000) * 100 = 1.6. This matches option , which indicates a ponderal index value of 1.6.

## Why Each Wrong Option is Incorrect
- **Option A:** Without a specific value provided, we cannot directly compare, but any option not equal to 1.6 would be incorrect based on the calculation.
- **Option B:** Similarly, without a specific value, we assume it's incorrect if not equal to 1.6.
- **Option D:** This option is incorrect because the calculated ponderal index is 1.6, not any other value.

## Clinical Pearl / High-Yield Fact
The ponderal index is useful in pediatric medicine for assessing whether a child's growth is appropriate for their height. A low ponderal index may indicate wasting, while a high ponderal index may suggest obesity. Remember, the normal ponderal index range in children is generally considered to be around 1.6 to 2.2, but it can vary slightly based on the population being studied.

## Correct Answer: .