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
Intra pulpal anesthesia is a form of: 
Select and explain. 
A. Pressure anesthesia., B. Intraosseous anaesthesia, C. Superficial anaesthesia, D. None of the above
A: Pressure anesthesia.
Answer: A: Pressure anesthesia. 
Explanation: None