In contrast to Annelids,the Platyhelminths show:

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:

Which of the following statements is true regarding $Taenia \ solium$?

Which of the following is true for $Taenia$?

In which of the following animals is the digestive system absent?

Both alternation of generations and alternation of hosts are present in