Number of juvenile stages found during the development of $Ascaris$.

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.

Which one of the following is a pseudocoelomate?

Which of the following groups of animals is bilaterally symmetrical and triploblastic?

Which of the following is not a digenetic worm?

Which characteristic is possessed by Ascaris (roundworm)?