Q.
Which of the following series of events is correct about the digestive system of frog? I. Prey $\rightarrow$ Mouth $\rightarrow$ Oesophagus $\rightarrow$ stomach $\rightarrow$ Small intestine $\rightarrow$ Cloaca II. Prey $\rightarrow$ Mastication by teeth $\rightarrow$ Stomach $\rightarrow$ Small intestine $\rightarrow$ Cloaca III. Tongue $\rightarrow$ Prey $\rightarrow$ Teeth $\rightarrow$ Stomach $\rightarrow$ Large intestine $\rightarrow$ Cloaca IV. Prey $\rightarrow$ Mouth $\rightarrow$ Teeth $\rightarrow$ Pharynx $\rightarrow$ Stomach $\rightarrow$ Small intestine $\rightarrow$ Rectum