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': 'Which of the following is false about disadvantage of Sod hypochlorite \nSelect and explain. \nA. Cannot remove smear layer alone, B. Precipitates on combination with chlorhexidine, C. Should not be used in acute pulpal abscess, D. None of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]