The most specific marker of renal function is-: (A) Creatinine clearance, (B) Insulin clearance, (C) Blood area, (D) Serum creatinine
Answer is D. Creatinine is a waste product that is produced continuously during normal muscle breakdown. ... Creatinine clearance in a healthy young person is about 95 milliliters per minute for women/120 milliliters per minute for men. This means that each minute, that person's kidneys clear 95-120 mL of blood free of creatinine. Ref Harrison20th edition pg 293