What do Platyhelminthes exhibit in contrast to Annelids?

What is the covering present around the body of parasitic animals belonging to the phyla Platyhelminthes and Nematoda?

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:

Planaria possesses high capacity of

Triploblastic acoelomate animals are

The larva of $Schistosoma$ is: