This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
Alpha granules of platelets contain all Except 
Select and explain. 
A. Fibronectin, B. Platelet factor-4, C. Platelet-derived growth factor, D. Serotonin
D: Serotonin
Answer: D: Serotonin 
Explanation: Alpha granules contain P.Selectin, Fibrinogen, Coagulation factor V, VWF, Fibronectin, Platelet factor 4, PDGF, TGF bDelta granules contains ADP, ATP, ionized Ca, Serotonin, EpinephrineReference: Robbins and Cotran Pathologic Basis of Disease; 9th edition; Volume I; Page no: 117