The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following procedures can be used to treat an oro-antral fistula resulting from posterior surgery: (Or) Oro-antral fistula in maxillary 3rd molar region is best/commonly treated by   (A) Buccal mucoperiosteal flap   (B) Palatal mucoperiosteal flap   (C) Bridge flap   (D) Palatal island flap
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