Which of the following is a toxin derived from castor beans and considered a potential weapon?

• A. Mustard gas
• B. Sarin
• C. Botulinum toxin
• D. Ricin

Answer: (D)

Ricin is a highly potent protein toxin found in castor beans. It works by halting protein production inside cells, which leads to cell death and can cause severe illness or death in exposed individuals. Because ricin can be obtained from castor bean materials with relatively simple processing, it has been discussed as a potential weapon in hazmat and security contexts.

The other options are not derived from castor beans: mustards are chemical warfare agents that blister and damage tissue; sarin is a nerve agent that disrupts the nervous system; botulinum toxin is a bacterial toxin that causes paralysis. The distinguishing factor is ricin’s plant-derived protein nature and its consideration as a weapon, making it the correct choice.