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': 'Thalidomide acts through - \nSelect and explain. \nA. Inhibiting angiogenesis, B. Inhibiting thymidylate synthase, C. Inhibition of Topo-isomerase I, D. All', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Inhibiting angiogenesis o The major antitumor activity of thalidomide is due to inhibition of angiogenesis.", 'role': 'assistant'}]