The correct option is
A Vinblastin
Vinblastine is an anti-cancer chemotherapy drug. It is used to treat Hodgkin lymphoma, non-Hodgkin's lymphoma, testicular, breast, head, neck and bladder cancers. The drug is given intravenously and might cause extensive tissue damage and blistering of skin if it escapes from the vein. Vinblastine is a plant alkaloid prepared from periwinkle plant.
Abrin is a water soluble lectin found in the seeds of rosary pea and is considered to be poisonous if swallowed.
Ricin is a toxic protein found in castor beans which inhibits the protein synthesis if ingested.
Carotenoids are yellow, orange plant pigments present in chlorophyll which absorb blue-green light and prevents the chlorophyll molecules from photooxidation.
Concanavalin is a glucose binding lectin obtained from jack beans.
Thus, the correct answer is option A.