Which of the following products is considered a lubricant laxative?

A. Magnesium Citrate: Magnesium citrate is an osmotic laxative. It works by drawing water into the intestinal lumen via osmotic pressure, softening stool and stimulating bowel movements. It does not coat or lubricate the stool. B. Mineral Oil: Mineral oil is a lubricant laxative. It coats the stool and intestinal mucosa, reducing water absorption from the stool and allowing it to pass more easily. This mechanism eases defecation without significantly stimulating peristalsis, making it distinct from osmotic or bulk-forming agents. C. Polyethylene Glycol 3350: Polyethylene glycol is an osmotic laxative that retains water in the stool through osmosis, increasing stool volume and promoting bowel movements. It does not provide lubrication or coat the stool. D. Psyllium: Psyllium is a bulk-forming laxative. It absorbs water and expands in the intestine, increasing stool bulk and stimulating peristalsis. It does not function by lubricating the stool.