What is the definition of a prototype drug?

A. This option incorrectly describes a placebo, which is not related to the concept of a prototype drug. B. A prototype drug is defined as a medication that is considered the standard or model for a particular drug class or category, serving as a reference for the development of other drugs in that class. C. Prototype drugs can be available in both brand and generic forms; this option is not accurate. D. Prototype drugs are not limited to pediatric use and can be prescribed for patients of all ages.