The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Aspirin acts on which part of brain?   (A) Substantia gelatinosa   (B) Limbic system   (C) Medulla   (D) Cortex
['(A) Substantia gelatinosa <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Substantia gelatinosa \n (B) Limbic system \n (C) Medulla \n (D) Cortex <> possible answers', '  Aspirin acts on which part of brain? <> context@']