The $Lung \ Fluke$ is:

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

In which of the following organisms,self-fertilization is rarely seen?

"Triploblastic, unsegmented, acoelomate exhibiting bilateral symmetry and reproducing both asexually and sexually, with some parasitic forms". The above description is the characteristic of phylum:

An animal without segmentation is:

The characteristics of a tapeworm are:
$(A)$ Large,quadrate scolex,without rostellum and hooks
$(B)$ Primary host man,and secondary host cattle
$(C)$ Length $5$ to $10$ metres
Identify the tapeworm.