<prompt> Extrinsic pathway of clotting factors is measured by?Prothrombin timeActivated partial thromboplastin timeBleeding timeClotting time  <response>: Ans. a Prothrombin timeRef: Robbins pathology 9th ed. 116-18Prothrombin timeExtrinsic pathwayFactor 57Activated partial thromboplastin timeIntrinsic pathwayFactor 8Bleeding timePlatelet function and platelet countPlatelet function and count 