To study inflammations, a test animal was injected with a lethal dose of tetanus toxin into the cavity of a turpentine-induced abscess. However, the test animal did not die. What is the most likely cause of such test result?

Answer options

1. Increased vascularization of the inflammation site
2. Formation of a barrier around inflammation
3. Activation of antibody synthesis during inflammation
4. Activation of detoxification function of phagocytes
5. Stimulation of leukopoiesis during inflammation