## Core Concept
The National Family Health Survey (NFHS) is a large-scale, multi-round survey conducted in a representative sample of households throughout India. It provides data on various health and family welfare issues, including teen pregnancy rates. Teen pregnancy, also known as adolescent pregnancy, refers to pregnancy in females aged 15 to 19 years.

## Why the Correct Answer is Right
NFHS-3, conducted in 2005-06, reported a significant prevalence of teen pregnancy in India. According to NFHS-3 data, the percentage of women aged 15-19 years who were pregnant or had given birth at least once was **16.0%**. This rate indicates a considerable proportion of adolescent girls facing pregnancy, which can have implications for their health, education, and socioeconomic status.

## Why Each Wrong Option is Incorrect
- **Option A:** This option is incorrect because it does not match the reported teen pregnancy rate from NFHS-3.
- **Option B:** Similarly, this option does not align with the data provided by NFHS-3.
- **Option D:** This option is also incorrect as it does not reflect the teen pregnancy rate stated in NFHS-3.

## Clinical Pearl / High-Yield Fact
A significant clinical pearl from NFHS data is that adolescent pregnancy is a critical issue in India, affecting girls' health, educational attainment, and future economic opportunities. Early pregnancy is associated with higher risks of maternal and fetal complications, underlining the need for targeted interventions to prevent teen pregnancies.

## Correct Answer Line
**Correct Answer: C. 16.0%**