The following are multiple choice questions (with answers) about medical knowledge.   **Question:** If a patient has gingival recession, how far should the gutta percha be trimmed back before sealing the coronat area?   (A) 1 mm below the level of the recession   (B) 1 mm below the ACJ   (C) 1 mm below the canal opening   (D) 1 mm below the roof of pulpal chamber
['(A) 1 mm below the level of the recession <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) 1 mm below the level of the recession \n (B) 1 mm below the ACJ \n (C) 1 mm below the canal opening \n (D) 1 mm below the roof of pulpal chamber <> possible answers', '  If a patient has gingival recession, how far should the gutta percha be trimmed back before sealing the coronat area? <> context@']