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Re: The doctor’s unapproved “health juice” first won him fortune
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08 Oct 2017, 17:42
Explanation
A quack is a “fraudulent doctor” and a shyster is a “con man” (in medicine or any field), so both work here. Sap and dupe are synonyms (suckers, people who have been tricked) that describe the people who fell for the doctor’s potion, not the doctor and his reputation.
Hence options Quack, shyster are best fits!