A relatively new strategy for treating certain tumors is to prevent the formation of new blood vessels,thus impairing tumor growth by starving the tumor of oxygen and nutrients.Drugs that use this strategy are known as

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Drugs that prevent the formation of new blood vessels are known as angiogenesis inhibitors. Option A (topoisomerase inhibitors) interfere with DNA replication, not tumor blood supply. Option C (aromatase inhibitors) block the activity of aromatase enzyme which causes a decrease in estrogen levels and hence used in breast cancer treatment. Option D (antimetabolites) interfere with the metabolic processes of cancer cells.

A Relatively New Strategy for Treating Certain Tumors Is to Prevent