The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which type of prefabricated post preparation system in mandibular molar is preferred?   (A) Tapered, screwed in   (B) Parallel, screwed in   (C) Tapered, passively cemented   (D) Parallel, partially cemented
['(D) Parallel, partially cemented <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Tapered, screwed in \n (B) Parallel, screwed in \n (C) Tapered, passively cemented \n (D) Parallel, partially cemented <> possible answers', '  Which type of prefabricated post preparation system in mandibular molar is preferred? <> context@']