Matching alimentary canal parts by relative lengths

Steps:

• Recall standard lengths: duodenum ≈25 cm (shortest), colon ≈150 cm (medium), ileum ≈350 cm (longest).
• Assume shown lengths follow descending order: longest, medium, shortest.
• Assign longest to ileum, medium to colon, shortest to duodenum.
• Match to option listing ileum, colon, duodenum.

Why C is correct:

• C orders parts from longest (ileum) to shortest (duodenum), aligning with anatomical measurements.

Why the others are wrong:

• A: Begins with shortest (duodenum), mismatches descending order.
• B: Starts with medium (colon) before longest (ileum), incorrect sequence.
• D: Places shortest (duodenum) before medium (colon), disrupts length order.

Final answer: C