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: Pharmacology
[{'content': 'Which of the following inhibits transcription ? \nSelect and explain. \nA. Cyclosporine, B. Rapamycin, C. 5-Flurouracil, D. Cyclophosphamide', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Cyclosporine Cyclosporine inhibits transcription by binding to a protein called cyclophilin. This complex then inactivates calcineurin. (Calcineurin is a protein which is responsible for the transcription of cytokine gene)", 'role': 'assistant'}]