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 true about direct filling gold \nSelect and explain. \nA. Properly condensed mat gold has no voids, B. Whatever may be the type voids are inherent, C. Voids can be avoided with manual condensation, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]