Which preparation is used to evacuate the bowels when administered rectally?

• A. Gargle
• B. Syrup
• C. Enema
• D. Suppository

Answer: (C)

The idea being tested is how a preparation is used when given through the rectal route to empty the bowels. An enema is a liquid preparation introduced into the rectum to cleanse the lower bowel. It works by softening stool, lubricating the rectum, and distending the colon, which stimulates peristalsis and leads to rapid bowel evacuation. This makes enemas the go-to rectal method for bowel cleansing or prep.

Gargling and syrup are not used rectally for bowel evacuation—they’re intended for the mouth or digestion, not the rectum. A suppository is inserted rectally and can act locally or systemically, or gently stimulate the rectum to soften stool, but it’s typically slower and less immediate for cleansing compared with an enema.