Option 1 is correct: Papilio antimachus, also called African giant swallowtail, is the most poisonous butterfly in the world. It contains a lot of cardiac steroid toxins. The toxin in a male Papilio antimachus can poison 20 cats. The males have narrow forewings with a maximum wingspan of 25cm, ranking first among all the male butterflies. Option 2 is correct: Venomous fish are species of fish which produce strong mixtures of toxins harmful to humans which they deliberately deliver by means of a bite, sting, or stab, resulting in an envenomation. The Reef Stonefish is the most venomous fish in the world. It has thirteen stout spines in the dorsal fin which can inject a highly toxic venom. Option 3 is correct: Many species of frog are known to be poisonous, such as the often colourful poison dart frogs. There are currently only two species of frog known to be venomous: Bruno's casque-headed frog (Aparasphenodon brunoi) and Greening's frog (Corythomantis greeningi). Both are found in Brazil and produce skin secretions like other poisonous frogs - but these species have spiny bone protrusions that make their poison venom.