Select the correct sequence of organs in the alimentary canal of insects, starting from mouth-
(A) Ileum 
(B) Oesophagus 
(C)  Crop
(D) Pharynx

Correct option is A

· The insect alimentary canal is divided into three regions:
1. Foregut (Pharynx → Oesophagus → Crop)
2. Midgut (Site of digestion and absorption)
3. Hindgut (Ileum → Colon → Rectum)
· The correct sequence is Pharynx → Oesophagus → Crop → Ileum.
· The crop serves as a storage organ, while the ileum is involved in nutrient absorption and water balance.