<prompt> One of the following toxalbumin is used as terrorist weaponRicinAbrinCrotonChilly  <response>: Ricin obtained from Ricinus communis: most poisonous naturally occurring substances known. Ricin is toxic by numerous exposure routes and its use by terrorists might involve poisoning of water or foodstuffs, inoculation ricin-laced projectiles, or aerosolization of liquid ricin or distribution of powder. 