The correct option is B Artificially acquired passive immunity
Anti-venom is given as a form of artificially acquired passsive immunity. Venom is collected from animals such as snakes. This is then injected into a horse or rabbit that produces antibodies against the venom. The dose of the injections is increased slowly. Hence, the amount of anti-venom antibodies increase in its body. Blood is then collected and antibodies are purified to obtain the antivenom injection. Thus, the correct answer is option D.