This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemical Mediators and Regulators of Inflammation, Subject name: Pathology
Chemoattractants among the following are? 
Select and explain. 
A. Histamine, B. Leukotriene B4 and C5a, C. Leukotriene C4 and C3a, D. Bradykinin
B: Leukotriene B4 and C5a
Answer: B: Leukotriene B4 and C5a 
Explanation: Ans. is 'b' i.e., Leukotriene B4 and C5a o Chemoattractant:- C5a (most potent), IL-8, LTB4, PAF, bacterial products, Lymphokine, Kallikrein.o C5a is the most potent chemoattractant