**Core Concept**
Trauma to a joint can lead to dislocation without fracture, resulting from the disruption of the ligamentous and capsular structures surrounding the joint. This is a common injury in sports medicine and orthopedics, often seen in the shoulder, elbow, and knee joints.

**Why the Correct Answer is Right**
Dislocation without fracture occurs when the ligaments and joint capsule are stretched or torn, allowing the bones to move out of their normal position. In the shoulder joint, for example, the labral tear and glenoid bone fracture can lead to dislocation without fracture. The humeral head may subluxate or dislocate anteriorly, posteriorly, or inferiorly due to the disruption of the glenohumeral ligaments. The rotator cuff muscles and tendons play a crucial role in stabilizing the shoulder joint, and their injury can contribute to joint instability.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because subluxation is a partial dislocation of a joint, whereas the question specifically asks for dislocation without fracture.
* **Option B:** This option is incorrect because a fracture is indeed present in this scenario, which is not what the question is asking for.
* **Option C:** This option is incorrect because a sprain is an injury to the ligaments surrounding a joint, but it does not necessarily involve dislocation.

**Clinical Pearl / High-Yield Fact**
The "unhappy triad" of the knee, which consists of medial collateral ligament (MCL) sprain, anterior cruciate ligament (ACL) tear, and medial meniscal tear, is a classic example of a dislocation without fracture. This injury pattern is common in contact sports such as soccer and football.

**Correct Answer: A. Dislocation without fracture is seen in subluxation.**