This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Biomarker not involved in acute kidney injury is 
Select and explain. 
A. NGAL, B. KIM 1, C. Micro RNA 122, D. Cystatin C
C: Micro RNA 122
Answer: C: Micro RNA 122 
Explanation: Ans. is 'c' i.e., Micro RNA 122