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
The main cytokine, involved in erythma nodosum leprosum (ENL) reaction is - 
Select and explain. 
A. Interleukin - 2, B. Interferon - gamma, C. Tumor necrosis factor-alpha, D. Macrophage colony stimulating factor
C: Tumor necrosis factor-alpha
Answer: C: Tumor necrosis factor-alpha 
Explanation: None