Which of following formula denotes free water clearance?: (A) Urine flow rate multiplied by osmolal clearance, (B) Urine flow rate minus osmolal clearance, (C) Urine flow rate divided by osmolol clearance, (D) Urine flow,rate plus osmolal clearance
Answer is B. Ans. is'b'i.e., Urine flow rate minus osmolal clearanceFree water clearance (CH2O):CH2O = V- Cosm