**Core Concept**
Gallows traction is a type of orthopedic traction used to treat fractures in children, particularly those with femoral fractures. It involves suspending the child's legs in a position of flexion, allowing for gentle traction and alignment of the femur.

**Why the Correct Answer is Right**
In a 2-year-old child, gallows traction is applied to manage a femoral fracture, which is a common type of fracture in toddlers. The goal of gallows traction is to realign the fractured femur, reduce pain and discomfort, and promote healing. This type of traction is effective in children because their bones are still growing and are more pliable, making it easier to manipulate and align the fracture.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not a specific type of fracture that would require gallows traction. While femoral fractures are common in toddlers, other types of fractures may require different treatment approaches.
**Option B:** This option is incorrect because it is not a relevant or specific type of traction used for femoral fractures in children.
**Option C:** This option is incorrect because it is a different type of traction used for a different type of fracture or condition.

**Clinical Pearl / High-Yield Fact**
Gallows traction is a safe and effective treatment option for femoral fractures in children, but it requires careful monitoring and adjustment to avoid complications such as nerve or blood vessel damage.

**Correct Answer: B. Femoral fracture.**