Which of the following is a poisonous snake?

(a) Naja

(b) Bangarus

(c) Viper

a, b, and c

All the options listed are poisonous snakes:

• Naja: This genus includes cobras, such as the Indian cobra (*Naja naja*), known for their potent neurotoxic venom.
• Bangarus: Commonly known as kraits, these snakes, like the common krait (*Bungarus caeruleus*), possess highly toxic neurotoxic venom.
• Viper: Vipers, including species like the Russell's viper (*Daboia russelii*), are venomous snakes with hemotoxic venom.