input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** In the formula for urea clearance, C = U x V/P, what does U stands for:   (A) Urinary concentration in g/24 hour   (B) Urinary concentration in mg/ml   (C) Urine osmolarity   (D) Urine volume per minute
output: ['(B) Urinary concentration in mg/ml <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Urinary concentration in g/24 hour  (B) Urinary concentration in mg/ml  (C) Urine osmolarity  (D) Urine volume per minute <> possible answers', '  In the formula for urea clearance, C = U x V/P, what does U stands for: <> context']