A 19 year old college student cuts his lower lip while saving and seek medical advice. Physical examination confirms a deeps tissue wound that exhibits the cardinal signs of inflammation. In response to collagen and other basement membrane proteins exposed at the site of injury, platelets release which of the following preformed mediators of inflammation?

Serotoin

thromboxane A2

Platelet-activating factor

Arachidonic acid

Prostacyclin