input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following defines the pressure in the vascular system in the absence of blood flow? (Asked twice)   (A) Pulse pressure   (B) Critical closing pressure   (C) Mean circulatory filling pressure   (D) Perfusion pressure
output: ['(C) Mean circulatory filling pressure <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Pulse pressure  (B) Critical closing pressure  (C) Mean circulatory filling pressure  (D) Perfusion pressure <> possible answers', '  Which of the following defines the pressure in the vascular system in the absence of blood flow? (Asked twice) <> context']