This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
Anaphylaxis is mediated by 
Select and explain. 
A. 5-hydroxytryptamine, B. Heparin, C. ProstaglandinImmunology, D. All of these
D: All of these
Answer: D: All of these 
Explanation: Answer- D. All of these* Primary mediators (These are present in mast cell granules) Includes:* Biogenic Amines :- Histamine, 5-Hydroxytryptamine* Proteoglycans : Heparin* Secondary mediators:* Leukotrienes :- LTC4 D4,V* Cytokines:- ILl,lLg,lL4,IL-5, IL4 TNF and GMCSF