Order of Food Passage in the Alimentary Canal

Steps:

• Food travels from the mouth through the esophagus (L) to reach the stomach (M).
• In the stomach, food is partially digested before entering the duodenum (K), the first part of the small intestine.
• Nutrients are absorbed in the small intestine, including the duodenum, before contents move to the large intestine.
• The colon (J) is part of the large intestine, where water is absorbed from undigested material.

Why D is correct:

• D follows the anatomical sequence defined by the digestive tract: esophagus → stomach → duodenum → colon.

Why the others are wrong:

• A starts with duodenum (K), but food reaches it after the stomach.
• B places duodenum (K) before stomach (M), reversing the flow.
• C begins with stomach (M) then esophagus (L), going backward against peristalsis.

Final answer: D