Read the text and choose the correct answer.
Pharmaceuticals are generally classified by chemical group, by the way they work in the body \(pharmacological effect\), and by therapeutic use. Alkaloids were the first pure pharmaceuticals derived from natural substances \(plants\); they include quinine, nicotine, cocaine, atropine, and morphine. Drugs of animal origin include glandular extracts containing hormones, such as insulin using in treating diabetes. Antibiotics, vaccines, human blood-plasma fractions, and steroid hormones are other important pharmaceuticals manufactured from natural substances.
What substances can be produced from plants?

• alkaloids
• hormones
• diabetes
• human blood-plasma fractions