Identify the incorrect pair.

Step-by-step solution

Abrin and ricin are toxins. The drugs include curcumin, etc. Ricin and abrin are potent biological toxins that are derived from plant sources (castor beans and rosary peas, respectively). More is known about ricin toxicity; however, abrin toxicity is similar in its mechanism of action. In the body, these toxins inhibit protein synthesis leading to cell death.