Which one of following fractures occurs only in skulls of infants? 

Concept:-

• The type of fracture that occurs only in the skulls of infants is known as a "Pond fracture." This type of fracture is unique to infants because their skull bones are not fully fused and are much softer compared to adult skulls.
• A Pond fracture is characterized by a depressed fracture, creating an appearance similar to a pond or indentation on the surface of the skull. This is due to the pliable nature of an infant's skull, which can deform significantly upon impact without necessarily breaking apart like adult bones might.
• The softer nature of the infantile cranial bones allows for this kind of depressed fracture without penetration through the entire thickness of the skull bone.

Therefore, the correct answer is:

• Pond fracture