## **Core Concept**
A pulled elbow, also known as nursemaid's elbow, is a common injury in young children where the radial head subluxates due to a sudden pulling of the arm. This condition involves the **radial head** and its relationship with the **annular ligament**.

## **Why the Correct Answer is Right**
The correct treatment involves reducing the subluxation by a specific maneuver. The **supination and flexion** method is highly effective, where the forearm is supinated and then flexed. This movement helps the annular ligament to slip back over the head of the radius, thereby reducing the subluxation.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because simply flexing the elbow does not address the rotational component required to reduce the subluxation.
- **Option B:** This option might involve some form of immobilization or different maneuver, which is not the standard first-line treatment for a pulled elbow.
- **Option C:** While some form of manipulation might be considered, the specifics here do not match the commonly recommended and highly effective supination and flexion method.
- **Option D:** This could imply a more invasive approach or unnecessary intervention, which is not recommended for a pulled elbow.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that the **supination and flexion maneuver** is often immediately effective and can be very relieving for the child. Parents and healthcare providers should be aware of this simple yet effective technique to manage pulled elbows.

## **Correct Answer:** D. Supination and flexion.