To assure stability of the product until expiry date, the label should indicate:

• A. Proper dosage
• B. Proper color
• C. Proper drug administration
• D. Proper storage

Answer: (D)

Stability over the shelf life hinges on how the product is stored, and the label should spell out those storage conditions. By specifying where and how to store it—such as keeping it in a cool, dry place, protecting it from light, or keeping the container tightly closed—the label helps preserve potency, effectiveness, and safety up to the expiry date. If storage instructions aren’t followed, active ingredients can degrade, impurities can form, and the product may become less effective or unsafe before its expiry. Other aspects like dosage relate to how much to use, appearance to cosmetic attributes, and administration to how it’s given; none of these ensure the product remains stable up to expiry.