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': 'Porosity in porcelain at condensation stage depends on: \nSelect and explain. \nA. Shape and size of particle, B. Uniform distribution of particle size, C. Number of particles, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]