**Core Concept**
A Jarjaway fracture, also known as a transverse nasal fracture, is a specific type of nasal bone fracture characterized by a horizontal or transverse fracture line. This type of fracture occurs when there is a direct impact to the nasal bridge, causing the nasal bones to break in a horizontal plane.

**Why the Correct Answer is Right**
The Jarjaway fracture typically occurs due to a direct blow to the nasal bridge, resulting in a horizontal fracture line that runs across the nasal bones. This type of fracture is often associated with a "butterfly" deformity, where the nasal bones are displaced laterally. The fracture line in a Jarjaway fracture typically involves the nasal bones and the nasal septum.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as the fracture line in a Jarjaway fracture is typically horizontal, not vertical.
**Option B:** This option is incorrect as the fracture line in a Jarjaway fracture is not typically oblique or diagonal.
**Option C:** This option is incorrect as the fracture line in a Jarjaway fracture is not typically sagittal or longitudinal.

**Clinical Pearl / High-Yield Fact**
It's essential to note that the Jarjaway fracture is often associated with a "butterfly" deformity, where the nasal bones are displaced laterally. This deformity can be a key diagnostic feature of this type of fracture.

**Correct Answer: C.**