( A ) $Pharynx \rightarrow Oesophagus \rightarrow Gizzard \rightarrow Ileum \rightarrow
Crop \rightarrow Colon \rightarrow Rectum$
( B ) $Pharynx \rightarrow Oesophagus \rightarrow Gizzard \rightarrow Crop \rightarrow Ileum \rightarrow Colon \rightarrow Rectum$
( C ) $Pharynx \rightarrow Oesophagus \rightarrow Crop \rightarrow Gizzard \rightarrow Ileum \rightarrow Colon \rightarrow Rectum$
( D ) $Pharynx \rightarrow Oesophagus \rightarrow Ileum \rightarrow Crop \rightarrow
Gizzard \rightarrow Colon \rightarrow Rectum$