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: Dental
According to US FDA, the machine used for taking intraoral radiographs is classified as 
Select and explain. 
A. Class-I, B. Class-II, C. Class-III, D. Class-IV
B: Class-II
Answer: B: Class-II 
Explanation: None