Which family of plants includes the rosy periwinkle, known for its medicinal properties?

• A. Cactaceae
• B. Apocynaceae
• C. Rosaceae
• D. Liliaceae

Answer: (B)

The rosy periwinkle, scientifically known as Catharanthus roseus, belongs to the Apocynaceae family. This plant is particularly noted for its medicinal properties, as it has been used to produce important chemotherapy drugs such as vincristine and vinblastine, which are effective in treating various types of cancer. The Apocynaceae family is characterized by plants that typically have milky sap and often contain alkaloids with medicinal effects, contributing to the rosy periwinkle's significance in pharmacology. This knowledge reinforces the understanding of plant classification and the potential benefits of plants in medicine. The other families mentioned do not include the rosy periwinkle or share the same level of medicinal relevance connected to this specific plant.