The right answer is an antiparasitic drug, Giardiasis is an intestinal infection caused by Giardia lamblia.
Antiparasitic drugs are a class of medications used in the control and cure of infections by parasites, including protozoa, helminths, and ectoparasites.
Antiparasitic drugs include several classes of drugs that cover a wide range of diseases caused by parasites.
Thus, the antiparasitic drug would be the most effective at destroying giardia.
To learn more about drugs click here:
https://brainly.com/question/6022349
