Step 1: Understanding the Rule of 9's.
The Rule of 9’s is a method used to estimate the total body surface area (TBSA) affected by burns. The body is divided into regions, each contributing 9% or a multiple of 9% of TBSA. Step 2: Analysis of body regions.
- The head accounts for 9%.
- The hand accounts for 1%.
- The lower back also accounts for 9%.
- The genitals account for only 1% in the Rule of 9's. Step 3: Conclusion.
The least percentage of body surface area in the Rule of 9's is allocated to the genitals. Therefore, the correct answer is (2).