**Core Concept**
The **extra-adrenal phaeochromocytoma**, also known as **paraganglioma**, is a rare tumor that arises from the sympathetic nervous system outside the adrenal glands. Imaging modalities play a crucial role in the diagnosis and localization of these tumors.

**Why the Correct Answer is Right**
Since the correct answer is not provided, I will give a general explanation. **Metaiodobenzylguanidine (MIBG) scan** is a sensitive imaging modality for evaluating extra-adrenal phaeochromocytoma. It works by targeting the norepinephrine transporters in the tumor cells.

**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific options, it's challenging to provide detailed explanations. However, generally, other imaging modalities like CT or MRI might be less sensitive than MIBG for extra-adrenal phaeochromocytoma due to their limited ability to specifically target the tumor cells.

**Clinical Pearl / High-Yield Fact**
Remember that **MIBG scan** is highly sensitive and specific for phaeochromocytoma and paraganglioma, making it a valuable tool in the diagnostic workup of these tumors.

**Correct Answer:** Not provided, but typically **MIBG scan** or a similar specific imaging modality would be the correct answer for evaluating extra-adrenal phaeochromocytoma.