The excretory unit found in the phylum $Platyhelminthes$ is: .........

Which one is the excretory organ in the $Platyhelminthes$?

Which of the following organisms lacks a digestive system?

$Taenia$ $solium$ derives its energy from the breakdown of

During its life cycle,$Fasciola$ $hepatica$ $(Liver$ $Fluke)$ infects its intermediate host and primary host at the following larval stages respectively:

$A$: Cysticercosis is caused by the accidental ingestion of onchospheres.
$R$: Taenia solium is a monogenetic parasite.