In the filarial worm $(Wuchereria \text{ } bancrofti)$, which of the following statements is true regarding their size?

Which of the following is true for $Aschelminthes$?

In pseudocoelomate organisms,excretion occurs through which of the following structures?

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.

The first animal group to possess a complete digestive system is .........

Which of the following is a differentiating trait of $Ascaris$?