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
[{'content': 'The main cytokine, involved in erythma nodosum leprosum (ENL) reaction is - \nSelect and explain. \nA. Interleukin - 2, B. Interferon - gamma, C. Tumor necrosis factor-alpha, D. Macrophage colony stimulating factor', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]