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
Thalidomide acts through - 
Select and explain. 
A. Inhibiting angiogenesis, B. Inhibiting thymidylate synthase, C. Inhibition of Topo-isomerase I, D. All
A: Inhibiting angiogenesis
Answer: A: Inhibiting angiogenesis 
Explanation: Ans. is 'a' i.e., Inhibiting angiogenesis o The major antitumor activity of thalidomide is due to inhibition of angiogenesis.