Question

Caminaridin is extracted from:

• A. Buprestid beetle
• B. Blister Beetle
• C. Chafer Beetle
• D. Pulse Beetle

Hint:

Remember: "Blister" in the name indicates the compound's vesicant (blister-causing) properties.

Answer 1

The Correct Option is B

Caminaridin (cantharidin) is a toxic defensive compound
Naturally produced by meloid beetles (family Meloidae), commonly called blister beetles
Historically used in medicine as "Spanish fly"
Other options:
Buprestid beetles: Produce no significant toxins
Chafer beetles: Plant feeders with no known medicinal compounds
Pulse beetles: Storage pests

Answer 2

Elimination by insect family and chemical ecology:
Buprestid (jewel) beetles are wood-boring insects with no known defensive toxin of medicinal relevance. Chafer beetles (Scarabaeidae) are plant and root feeders without a comparable defensive chemical. Pulse beetles (Bruchidae) are stored-grain pests, again with no such toxin.
Only members of the family Meloidae, the blister beetles, secrete cantharidin, historically called "Spanish fly", as a haemolymph-based defensive compound that causes blistering on contact.
By elimination of the other three beetle groups, the source is the Blister Beetle.