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
[{'content': 'In pulpotomy, medicament used for preservation of pulp: \nSelect and explain. \nA. Calcium hydroxide, B. Glutaraldehyde, C. Ferric sulphate, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Devitalisation\n\nFormocresol\nMummifying paste\nElectrocautery\n\nPreservation\n\nCa(OH)2, Fe2(SO4)3\nGlutaraldehyde\n\nRegeneration\n\nBone morphogenic protein\nTricalcium phosphate', 'role': 'assistant'}]