<prompt> Which of the following complement act as a chemoattractant of neutrophils?C3aC3bC5aLTB4  <response>: C5a and the C5,6,7 complex attract neutrophils. They migrate especially well toward C5a. C5a also enhances the adhesiveness of neutrophils to the endothelium. Ref: Levinson W. 2012. Chapter 63. Complement. In W. Levinson Ed, Review of Medical Microbiology Immunology, 12e. 