This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
In tuberculosis, the cytokine playing major role in the conversion of tissue macrophages in to epithelloid cells - 
Select and explain. 
A. Interferon gamma, B. Tumor necrosis factor, C. Interleukin 12, D. Macrophage chemoattractant protein
A: Interferon gamma
Answer: A: Interferon gamma 
Explanation: IFNg is an impoant activator of macrophages Reff : Ananthanarayan & Panikers textbook of microbiology 9th edition pg: 155.