This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy, Subject name: Pharmacology
[{'content': 'Tildrakizumab was approved in March 2018 for \nSelect and explain. \nA. Psoriasis, B. HIV, C. Rheumatoid ahritis, D. Hepatitis C', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Tildrakizumab was designed to block interleukin-23, a cytokine that plays an impoant role in managing the immune system and autoimmune disease. It is approved for the treatment of moderate-to-severe plaque psoriasis.Ref:', 'role': 'assistant'}]