This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
role of toclizumab in a patient with ARDS developed due to covid 19 
Select and explain. 
A. it acts by halting lysogenic phase of corona virus, B. it stops the lung parenchymal damge by the virus, C. it is a IL-6 receptor inhibitor, D. all the above
C: it is a IL-6 receptor inhibitor
Answer: C: it is a IL-6 receptor inhibitor 
Explanation: Tocilizumab, a monoclonal antibody directed against the interleukin-6 receptor, has been proposed to mitigate the cytokine storm syndrome associated with severe COVID-19. We aimed to investigate the association between tocilizumab exposure and hospital-related moality among patients requiring intensive care unit (ICU) suppo for COVID-19. ref : www.ncbi.gov