This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Investigation of choice for parotid fistula 
Select and explain. 
A. CT Scan, B. X-ray, C. Starch iodine Test, D. Sialogram
D: Sialogram
Answer: D: Sialogram 
Explanation: Starch iodine Test is used for Frey's Syndrome.