**Core Concept**
Agnus Hunt traction is a type of skeletal traction used in orthopedic surgery to manage long bone fractures, particularly in the lower extremities. It involves the application of a force to the bone through a pin or wire inserted into the bone, with the goal of promoting healing and alignment.

**Why the Correct Answer is Right**
The Agnus Hunt traction is specifically used for fractures of the femur and tibia, where the application of a force to the bone is necessary to achieve proper alignment and healing. This type of traction is commonly used in cases where the bone is out of place or has become displaced, and the patient requires immobilization to allow the bone to heal properly. The Agnus Hunt traction is typically applied in a hospital setting and requires close monitoring by a medical professional.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Agnus Hunt traction is not typically used for fractures of the humerus or other upper extremity bones.
**Option B:** This option is incorrect because Russell traction is a different type of skeletal traction used for scoliosis and other spinal deformities.
**Option C:** This option is incorrect because Pavlik harness is a type of orthotic device used for hip dysplasia in infants, not for long bone fractures.

**Clinical Pearl / High-Yield Fact**
Agnus Hunt traction is a type of skeletal traction that requires close monitoring by a medical professional to prevent complications such as nerve damage or bone infection.

**Correct Answer:** C.