An animal devoid of anus is

To which of the following Phylum does the class $Trematoda$ belong?

Which of the following is the free-swimming ciliated larval stage of the Liver Fluke ($Fasciola$ $hepatica$)?

Tapeworm does not possess a digestive system because it:

In $Fasciola$ (liver fluke),the digestive system is:

Given below are two statements.
Statement $I$: Cephalic ganglion appears like $U$ shaped structure in Hydra.
Statement $II$: Ventral nerve cords are connected to each other by commissure in a ladder like manner in Planarian.
In the light of above statements,choose the most appropriate answer from the options given below: