Which of the following is NOT a route of medication administration?

The correct answer is the option that refers to "injection through the ear," as this is not a recognized or standard route for medication administration. Common routes of medication administration include oral (taken by mouth), topical (applied directly to the skin), and inhaled (delivered through the respiratory tract).

Oral medications are widely used for their convenience and efficacy, allowing substances to be absorbed through the gastrointestinal tract. Topical medications provide localized treatment, often for dermatological issues, and are absorbed through the skin. Inhaled medications are commonly used for respiratory conditions, allowing for quick absorption into the bloodstream via the lungs.

In contrast, injecting medication through the ear is not a standard practice in pharmaceutical care. Medications for ear ailments are traditionally administered topically as ear drops, ensuring the medication acts directly on the targeted area without the need for injections. This distinction highlights why "injection through the ear" does not align with accepted medication administration routes.