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 60 year old male patient complains of food lodgment in upper right back teeth region. Patient gives h/o RCT with 16 and 17. Crown cutting was done with 16 and 17 and impression was taken with type V gypsum product. The setting expansion of this gypsum material is- \nSelect and explain. \nA. 0.10%, B. 0.15%, C. 0.30%, D. 0.20%', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The setting\xa0expansion\xa0has\xa0been\xa0increased\xa0from\xa0a maximum\xa0of\xa00.10%\xa0to\xa00.30%.\xa0The\xa0rationale\xa0for\xa0increasing setting\xa0expansion\xa0is\xa0that\xa0certain\xa0newer\xa0alloys,\xa0such\xa0as\xa0base metal, have a greater casting shrinkage than do the traditional noble\xa0metal\xa0alloys.\xa0Thus,\xa0higher\xa0expansion\xa0is required in the stone die to aid in compensating for the alloy solidification shrinkage.', 'role': 'assistant'}]