Which of the following is not a digenetic worm?

Pseudocoelom develops from

Which of the following animals possesses a complete digestive tract?

Male $Ascaris$ is differentiable from female $Ascaris$ in:

Which of the following statements are correct about the life cycle of $Ascaris \; lumbricoides$?
$(A)$. Infective agent - Embryonated egg with $II$ Juvenile
$(B)$. Fertilised eggs containing the unsegmented ovum are passed with faeces
$(C)$. Four moultings of the larva occur: two outside in soil within the egg-shell, one in lungs and one in intestine
$(D)$. Site of location of worm - small intestine.

What type of symmetry do Nematoda (roundworms) exhibit?