Rhabdites occur in

Bilaterally symmetrical and acoelomate animals are exemplified by

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:

Identify the correct pair of the phylum and three examples.

Both alternation of generations and alternation of hosts are present in

The excretory structure in flatworms/Taenia is ........