<prompt> Most accurate measurement of extracellular fluid volume ECF can be done by using:SucroseMannitolInulinAminopyrine  <response>: -Antipyrine or Aminopyrine is used for TBW measurement. Hence, option D is ruled out. -No ideal marker for ECF measurement is available. -Among the given options, most accurate measurement of ECF volume is that obtained by using Inulin. 