<prompt> Most accurate measurement of extracellular fluid volume ECF can be done by usingSucroseMannitolInulinAminopyrine  <response>: Ans. c InulinRef: Guyton, 13th edp.309Inulin - Gold standard substance for ECF measurementOther indicators used in ECF measurement are,SucroseMannitolSodium Thiosulphate 