This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
The investigation of choice for extra-adrenal pheochromocytoma 
Select and explain. 
A. CT, B. MRI, C. X-ray, D. MIBG scan
A: CT
Answer: A: CT 
Explanation: MIBG scan is useful for extra-adrenal pheochromocytoma but IOC is MRI even for extra-adrenal pheochromocytoma