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': 'A 40 year old male patient complains of decayed tooth. Patient gives history of cavity preparation and restoration with mixture of spherical alloy particles and mercury done with 26. Intra-oral examination reveals proximal caries with 26. Which of the following is not the property of alloy particles used to restore the tooth in this patient?\u200b \nSelect and explain. \nA. Packed efficiently, B. Requires less mercury, C. Decrease fluidity of the mixture, D. Less resistance to particle sliding\u200b', 'role': 'user'}, {'content': 'Answer: C \nExplanation: It was demonstrated that\u200b by spherodizing the alloy particles, the particles\u200b packed more efficiently and required\u200b much less mercury to make a practical mixture. Spherical particles also increased the fluidity of the mixture by\u200b presenting less resistance to particle sliding. Using some\u200b or all spherical alloy particles, it is possible to reduce the\u200b mercury portion of the mixture to less than 50% by\u200b weight.\u200b\nReference: Sturdevant’s Art and Science of Operative Dentistry, Mosby, 4th Edition, Page No: 149', 'role': 'assistant'}]