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': 'According to Lecompte (1987), the following are  the  recommendations  for topical application  of  high  potency  fluoride products EXCEPT- \nSelect and explain. \nA. No  more than 2 g of gel per tray or approximately  40%  of tray capacity should  be  dispensed., B. The use of a saliva ejector  during  the  procedure  is recommended., C. Following  the procedure, the  patient  should  be instructed not to expectorate., D. When utilizing custom individually fitted trays, utilize only 5-10 drops of products per tray.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: According to Lecompte (1987), the following are\xa0 the\xa0 recommendations\xa0 for topical application\xa0 of\xa0 high\xa0 potency\xa0 fluoride\xa0products:\xa0\n1. No\xa0 more than 2 g of gel per tray or approximately\xa0 40\xa0 %\xa0 of tray capacity should\xa0 be\xa0 dispensed.\xa0 Even\xa0 more conservative\xa0 amounts\xa0 should\xa0 be considered for small children.\xa0\n2. Because patient may have the need to swallow\xa0 during\xa0 a\xa0 4\xa0 minute\xa0 topical application procedure, the use of a saliva\xa0ejector\xa0 during\xa0 the\xa0 procedure\xa0 is recommended.\xa0\n3. Following\xa0 the\xa0 4\xa0 minutes\xa0 application procedure, the\xa0 patient\xa0 should\xa0 be instructed to expectorate thoroughly for from 30 sec to one minute, regardless of whether high speed\xa0 suction is utilized or not. Expectoration is probably the single most effective way\xa0 of reducing orally retained fluoride.\xa0\n4. When utilizing custom individually fitted trays for patients requiring daily or weekly application\xa0 of\xa0 a\xa0 high\xa0 fluoride\xa0concentration product, utilize only 5-10 drops of products per tray.', 'role': 'assistant'}]