<prompt> Which of the following is not a component of the dense granules of platelets?ADPCalciumEpinephrinePlatelet factor 4  <response>: Ans. d Platelet factor 4Ref: Robbins 9thpg 660Dense or d granules of platelets contain: DENSEaDENosine diphosphate ADP Q, Serotonin Q, Epinephrine Q, Ca 