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
Pharmacologic agent used for pulpotomy are all except: 
Select and explain. 
A. Formocrsol., B. Laser., C. Collagen, D. Ferric sulphate.
B: Laser.
Answer: B: Laser. 
Explanation: Pharnacologic agents which can be used for pulpotomy in primary teeth are:

Formocresol
Glutaraldehyde
Calcium hy roxi
Collagen
Ferric sulfatee 

Non-pharmacologic  agents

Electrosurgery
Laser therapy.