<prompt> Macrophages- false statement is?Derived from monocytesHarbor MycobacteriaInvolved in Type 3 HSNProduces TNF and interleukins  <response>: Ans. c Involved in Type 3 HSNRef: Robbins 9thpg 210A. TrueMonocytes in tissues are known as MacrophagesB. TrueMacrophages engulf Mycobacteria but are not able to kill it; So they harbor MycobacteriaC. FalseMacrophages are involved in Type 4 Hypersensitivity not type 3, which is immune- complex mediatedD. True. Macrophages secrete TNF, IL-1, and chemokines, which promote inflammation. Macrophages also produce IL-12, thereby amplifying the TH1 response 