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
[{'content': 'The following is not an immunomodulator \nSelect and explain. \nA. Tacrolimus, B. Cyclosporin, C. Cylcoserin, D. Sirolimus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Cycloserine is an antibiotic. Remaining all are immune-modulators which are calcineurin inhibitors.Ref: Katzung 13th ed Pg 1135', 'role': 'assistant'}]