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
In irreversible pulpitis intrapulpal pressure becomes: 
Select and explain. 
A. 10mmof Hg., B. 20mm of Hg., C. 25mm of Hg., D. 40mm of Hg.
C: 25mm of Hg.
Answer: C: 25mm of Hg. 
Explanation: Normal intrapulpal pressure is 10mm of Hg.