Which of the following is NOT an oral formulation? A: Controlled-release tablets B: Syrup C: Hard capsules D: Suppository

In<br/>a glycerin gelatin suppository, the ratio of water :gelatin:glycerin<br/>should be() A: 20∶20∶60 B: 10∶30∶60 C: 10∶20∶70 D: 25∶25∶50