Procedure of introducing liquids into the rectum and colon via the anus often used to treat constipation.

• A. Enema
• B. Laxative
• C. Cathartic
• D. Suppository

Answer: (A)

Introducing liquids into the rectum and colon via the anus to relieve constipation is an enema. Enemas deliver a liquid solution directly into the lower bowel, softening stool and stimulating peristalsis to promote evacuation. They can be oil-based or aqueous and may be retained for a period or expelled as a bowel movement, making them especially useful when rapid relief is needed or oral options aren’t feasible.

Laxatives, by contrast, are substances that help move stool through the digestive tract and can be taken by mouth or rectally, but they describe a broad medication category rather than the specific method of delivering liquid into the colon. A cathartic is a potent type of laxative that induces quick, more forceful evacuation. A suppository is a solid dosage form inserted into the rectum to soften stool or provide local effects, not a liquid-delivery procedure. So the described procedure aligns with an enema.