This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunomodulators, Subject name: Pharmacology
[{'content': 'Which of the following immunosuppressive agents acts selectivity by inhibiting helper T-Cells? \nSelect and explain. \nA. Cyclophosphamide, B. Azathioprine, C. Cyclosporine, D. Cystosine arabinoside', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Calcineurin inhibitors (Specific T-cell inhibitors) Cyclosporine- It profoundly and selectively inhibits T lymphocyte proliferation, IL-2 and other cytokine production and response of inducer T cells to IL-l, without any effect on suppressor T-cells. Lymphocytes are arrested in G0 or G1 phase- used in various organ transplantations ESSENTIALS of MEDICAL PHARMACOLOGY SEVENTH EDITION -KD TRIPATHI Page:885,886', 'role': 'assistant'}]