input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** The odontoblasts killed during cavity preparation are derived from:   (A) Unaffected odontoblasts from the pulp   (B) Undifferentiated cells   (C) Histocytes   (D) Osteoblasts
output: ['(B) Undifferentiated cells <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Unaffected odontoblasts from the pulp  (B) Undifferentiated cells  (C) Histocytes  (D) Osteoblasts <> possible answers', '  The odontoblasts killed during cavity preparation are derived from: <> context']