**Core Concept**
The Ponderal index is a measure used to assess the nutritional status of newborns, calculated using the formula: (weight in grams / (length in cm)^3) * 100. It helps in identifying growth restriction or abnormalities in newborns.

**Why the Correct Answer is Right**
To calculate the Ponderal index, we use the given weight (2000 g) and length (50 cm) in the formula. Substituting these values, we get: (2000 / (50)^3) * 100 = (2000 / 125000) * 100 = 1.6.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not match the calculated Ponderal index.
**Option B:** This option is also incorrect as it is not the result of the calculation.
**Option D:** This option is incorrect because the calculation yields a specific value, which is not this option.

**Clinical Pearl / High-Yield Fact**
The Ponderal index is useful in distinguishing between symmetric and asymmetric growth restriction in newborns. A low Ponderal index indicates growth restriction.

**Correct Answer:** C. 1.6