Following injury to a blood vessel, immediate haemostasis is achieved by-
Robbins basic pathology, 9th edition, page no:79 Vascular injury primarily causes a transient aeriolar vasoconstriction through reflex neurogenic mechanisms augmented by local secretion of endothelin. All other options follow this. So the answer is option 2.
Fibrin deposition
Vasoconstriction
Platelet adhesion
Thrombosis
General pathology