**Core Concept**
Sutural separation refers to the widening or separation of cranial sutures, which are fibrous joints between the bones of the skull. This concept is crucial in understanding various types of skull fractures and their implications.

**Why the Correct Answer is Right**
Diastatic fracture is a type of fracture that occurs in the sutures of the skull, leading to separation or widening of these sutures. This type of fracture is commonly seen in infants and young children due to the pliability of their skulls and the relatively soft sutures. The mechanism of injury typically involves a sudden increase in intracranial pressure, which causes the sutures to separate. This can be due to head trauma, birth trauma, or other conditions that increase intracranial pressure.

**Why Each Wrong Option is Incorrect**
**Option B:** Penetrating fracture refers to a type of fracture where the skull is penetrated by an object, such as a bullet or a sharp object. This type of fracture does not involve sutural separation.
**Option C:** Cut fracture refers to a type of fracture where the skull is cut or lacerated, often due to a sharp object. This type of fracture does not specifically involve sutural separation.
**Option D:** There is no such term as "Performing fracture" in the context of skull fractures. This option appears to be a distractor.

**Clinical Pearl / High-Yield Fact**
It is essential to remember that diastatic fractures can be a sign of increased intracranial pressure in infants and young children, and prompt medical attention is necessary to prevent further complications.

**✓ Correct Answer: A. Diastatic fracture**