Which of the following is the route of administration for parenteral medications?

Oral administration involves taking medication by mouth, allowing it to be absorbed through the digestive system. This route is not considered parenteral because it does not involve injection and is subject to first-pass metabolism in the liver, which can affect drug efficacy.

The term "invasation" is not a recognized route of medication administration. It may imply an invasive procedure, but it does not correctly describe any specific method of delivering medications. Parenteral administration specifically refers to methods like injection, not undefined terms.

"Institution" does not relate to any known medication administration route. It appears to be a misinterpretation or typographical error, as it does not convey any method of drug delivery, particularly not in a clinical context.

Transdermal administration involves delivering medication through the skin, typically via patches. While it is effective for certain types of drugs, it is not classified as parenteral since it does not involve injection or direct entry into the bloodstream.