Which set of routes corresponds to "Oral, Sublingual, Rectal, Intranasal" as described in the material?

• A. IV, IM
• B. Oral, Sublingual, Rectal, Intranasal
• C. Inhalation
• D. Topical

Answer: (B)

These routes are noninjection methods of delivering medication, meaning they don’t use needles. The group listed—oral, sublingual, rectal, and intranasal—includes common nonparenteral routes, each with its own absorption path and onset.

Oral administration goes through the GI tract and the liver (first-pass metabolism), which can slow onset. Sublingual and intranasal routes bypass the liver, leading to quicker absorption. Rectal administration partly bypasses first-pass metabolism and is useful when swallowing is not possible.

The other options are different categories: IV and IM are injections (parenteral). Inhalation is a separate route involving the lungs, and topical is typically local to the site of application. The set provided matches the described group exactly, so it’s the correct one.