This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Radiology
Ultrasonography transducer contains ___: 
Select and explain. 
A. Sodium fluoride, B. Lead Zirconate, C. Caesium fluoride, D. None
B: Lead Zirconate
Answer: B: Lead Zirconate 
Explanation: Ans. B. Lead ZirconateLead Zirconate titanate (PZT) is the most widely used material in the ultrasound transducers/probes replacing the previously discovered barium titanate.