Rubber, cotton, medicines, etc., are useful products obtained from plants.
Medicines are either man made (i.e., synthetic) or obtained from living organisms like plants, bacteria, animals, etc, and hence, the letter are called natural products. Sometimes, natural products are chemically altered by man to reduce toxicity of side effects. Write against each of teh following whether they were initially obtained as a natural product or as synthetic chemical.
(a) Penicillin (b) Sulphonamide (c) Vitamin-C (d) Growth hormone