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: Radiology
Thyroid dose from panoramic radiography is about: 
Select and explain. 
A. 22 Gy, B. 34 μGy, C. 51 μGy, D. 74 μGy
D: 74 μGy
Answer: D: 74 μGy 
Explanation: None