Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth :
1. Pharynx → Oesophagus → Crop → Gizzard → Ileum → Colon → Rectum
2. Pharynx → Oesophagus → Gizzard → Crop → Ileum → Colon → Rectum
3. Pharynx → Oesophagus → Gizzard → Ileum → Crop → Colon → Rectum
4. Pharynx → Oesophagus → Ileum → Crop → Gizzard → Colon → Rectum