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
All of the following are the features of formocresol used as pulpotomy agent except: 
Select and explain. 
A. It bind reversibly., B. Small droplet has deeper penetration., C. It does not cross the apex., D. It is carcinogenic.
C: It does not cross the apex.
Answer: C: It does not cross the apex. 
Explanation: formocresol crosses the apex.