input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** What is the difference between RIFLE & KDIGO criteria in differentiating a tubular injury?   (A) Uosm   (B) Urinary Na   (C) Urinary NGAL   (D) FeNa (UN, x Scr / SNa x Ucr)
output: ['(C) Urinary NGAL <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Uosm  (B) Urinary Na  (C) Urinary NGAL  (D) FeNa (UN, x Scr / SNa x Ucr) <> possible answers', '  What is the difference between RIFLE & KDIGO criteria in differentiating a tubular injury? <> context']