**Core Concept**
The question is testing the understanding of different types of manual strangulation. Manual strangulation is a form of homicide or injury caused by compressing the neck, which can lead to asphyxia or airway obstruction. The specific mechanism of strangulation being tested here involves the use of an elbow.

**Why the Correct Answer is Right**
The correct answer is **C. Elbow strangulation**. This type of strangulation occurs when the elbow is used to compress the neck, often in a manner that involves bending the elbow to place pressure on the neck. This can be particularly effective in causing damage to the neck structures, including the larynx and trachea. The force applied by the elbow can lead to significant compression of the neck, potentially resulting in severe injury or death.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not a recognized type of manual strangulation.
* **Option B:** This option is also not a recognized type of manual strangulation, and the mechanism described does not match any known method of strangulation.

**Clinical Pearl / High-Yield Fact**
In cases of suspected strangulation, it is essential to carefully examine the neck for signs of trauma, including bruising, lacerations, or compression marks. The presence of these signs can help determine the mechanism of injury and guide further investigation.

**Correct Answer:** C. Elbow strangulation