**Core Concept**
The question requires the identification of a pneumatic bone, which is a type of bone that contains air-filled cavities or sinuses. Pneumatic bones are typically found in the skull and are characterized by their light weight and unique structure.

**Why the Correct Answer is Right**
The correct answer is likely the mastoid part of the temporal bone. This bone contains the mastoid air cells, a series of air-filled cavities that provide ventilation and drainage to the middle ear. The mastoid air cells are a key feature of the pneumatic structure of this bone.

**Why Each Wrong Option is Incorrect**
**Option A:** The frontal bone, while part of the skull, is not typically considered a pneumatic bone. It does contain the frontal sinuses, but these are not as extensive as the air cells found in the mastoid portion of the temporal bone.

**Option B:** The parietal bone forms part of the cranium, but it is not a pneumatic bone. It does contain some small air-filled spaces, but these are not as prominent as those found in the mastoid portion of the temporal bone.

**Option C:** The occipital bone forms the posterior part of the skull, but it is not a pneumatic bone. It does contain some small air-filled spaces, but these are not as extensive as those found in the mastoid portion of the temporal bone.

**Clinical Pearl / High-Yield Fact**
The pneumatic structure of the mastoid portion of the temporal bone is important in the context of otitis media, a type of ear infection that can spread to the mastoid air cells. Understanding the anatomy of this bone is crucial for diagnosing and treating this condition.

**Correct Answer:** C.