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': 'For PPS scoring on cast best instrument is? \nSelect and explain. \nA. Wax spatula, B. BP Blade no.22, C. Kingsley scraper, D. Hollenbeck carver', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]