<prompt> If clearance of a drug equals the CFR, it implies thatDrug is reabsorbed in renal tubulesDrug is secreted into renal tubulesDrug is neither secreted or reabsorbed in renal tubulesNone of the above  <response>: Clearance GFR, If there is no secretion or reabsorption in renal tubules.Clearance GFR, there is net tubular secretion.Clearance GFR, there is net tubular reabsoption. 