<prompt> Which of following formula denotes free water clearance?Urine flow rate multiplied by osmolal clearanceUrine flow rate minus osmolal clearanceUrine flow rate divided by osmolol clearanceUrine flow,rate plus osmolal clearance  <response>: Ans. isbi.e., Urine flow rate minus osmolal clearanceFree water clearance CH2O:CH2O V- Cosm 