Correct Answer: D

Rationale: The correct answer is D, Nonsteroidal anti-inflammatory drugs (NSAIDs). NSAIDs are known to cause gastritis by irritating the stomach lining. Choice A, Milk, is unlikely to cause gastritis and is actually a common remedy for mild gastritis symptoms. Choice B, Bicarbonate of soda or baking soda, is often used to relieve heartburn and indigestion, not cause gastritis. Choice C, Enteric-coated aspirin, is less likely to cause gastritis compared to NSAIDs because the enteric coating helps protect the stomach lining from irritation.

Correct Answer: C

Rationale: A perforated ulcer is most likely to directly cause peritonitis due to the leakage of gastric contents into the peritoneal cavity.

Correct Answer: A

Rationale: Limiting fat intake is a recommended measure to reduce the risk of colon cancer. Including fiber, undergoing annual rectal examinations, and sigmoidoscopy are also important, but limiting fat intake is directly related to reducing cancer risk.

Correct Answer: A

Rationale: Increasing fluid intake helps to enhance the effectiveness of colostomy irrigation by softening the stool and promoting better fecal return.

Correct Answer: A

Rationale: Cleansing the peristomal skin meticulously is crucial to prevent irritation and infection around the stoma.