*Catharanthus roseus* contains:

Correct answer: (a) Vincristine

Explanation

*Catharanthus roseus* (the Madagascar periwinkle, sadabahar) contains the alkaloids vincristine and vinblastine. Both are anti-cancer drugs, used especially against leukaemia and lymphomas; they stop cell division by blocking the formation of the spindle.

• Taxol comes from the yew (*Taxus*).
• Aflatoxin is a cancer-causing poison made by the fungus *Aspergillus flavus* on stored grain and groundnuts.
• Apigenin is a flavonoid found in parsley and chamomile.