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': 'The chief advantage of zinc phosphate cement is its: \nSelect and explain. \nA. Good compressive strength, B. Film thickness, C. Lack of irritation, D. Low solubility', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Film thickness\nThe smaller the particle size, less is the film thickness. The thickness is lesser than the size of the particles because, during mixing the particles are crushed and dissolved. The thickness can also be reduced by applying pressure on the casting during seating.\nThis is the chief advantage of zinc phosphate.\nRef- Manapallil 3rd ED P:92', 'role': 'assistant'}]