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
Broadbent cephalostat uses: 
Select and explain. 
A. 2 x-ray sources and 2 film holders., B. 1 x-ray source and 1 film holder, C. 1 x-ray source and 2 film holders, D. None of the above.
A: 2 x-ray sources and 2 film holders.
Answer: A: 2 x-ray sources and 2 film holders. 
Explanation: None