The correct sequence of parts in the human alimentary canal is (d) Mouth → oesophagus → stomach → small intestine → large intestine.
Explanation: Food enters the body through the mouth, travels down the esophagus, then reaches the stomach where it is partially digested. After the stomach, the food moves to the small intestine for further digestion and absorption of nutrients. Finally, the remaining waste goes to the large intestine for water absorption and excretion.
Why other options are incorrect:
(a) Mouth → stomach → small intestine → oesophagus→ large intestine:
This sequence is incorrect because the esophagus should come after the mouth and before the stomach.
(b) Mouth → oesophagus → stomach → large intestine→ small intestine:
This sequence is incorrect as the small intestine should come after the stomach and before the large intestine.
(c) Mouth → stomach → oesophagus → small intestine→ large intestine:
This sequence is incorrect as the esophagus should come after the mouth and before the stomach.