<prompt> True for von-willebrand diseaseNormal paial thromboplastin timeDecreased plateletsNormal prothrombin timeNormal bleeding time  <response>: VW factor- On trauma leads to formation of platelet plug at the site- Extrinsic pathway is activated V, VII - Intrinsic pathway is activated VIII, etc -Fibrin Fibrin insoluble Platelet plug is tested by bleeding time Extrinsic pathway is tested by prothrombin time PT Intrinsic pathway is tested by aPTT activated paial PT VWF plays a vital pa in the link between platelet plug intrinsic factor Therefore, VWF if affected due to some reason then BT aPTT but PT Normal IOC for VWD - RISTOCEIN aggregation test 