## **Core Concept**
The question tests knowledge of the Lund-Browder chart, which is used to estimate the total body surface area (TBSA) burned in patients, particularly children. The chart provides a more accurate estimation of TBSA burned compared to the "rule of nines" for adults. It takes into account the age-related differences in body proportions.

## **Why the Correct Answer is Right**
The Lund-Browder chart gives specific percentages for different body parts based on age. For children aged 10-14 years, the proportions are closer to those of adults but still account for some differences. The back of a child in this age group contributes **16%** to the TBSA. This is because, according to the Lund-Browder chart, the posterior trunk (back) in this age group is estimated to be 16% of the total body surface area.

## **Why Each Wrong Option is Incorrect**
- **Option A: 9%** - This percentage is incorrect for the back of a 10-14-year-old child. It underestimates the surface area.
- **Option B: 14%** - This is still not the correct percentage for the back of a child in this age group. It slightly underestimates the actual percentage.
- **Option D: 18%** - This option overestimates the percentage of TBSA for the back of a 10-14-year-old child.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that the Lund-Browder chart is particularly useful in pediatric patients because it adjusts for age. For example, the head and neck area represents a larger proportion of the TBSA in younger children compared to adults. When assessing burns, accurately estimating the TBSA burned is crucial for determining the severity of the burn and guiding fluid resuscitation.

## **Correct Answer:** C. 16%