Excretory pores present in $Ascaris$ are

In which phylum is the male smaller in size than the female?

$Caenorhabditis elegans$ is a . . . . . . .

Assertion $A$: In $Aschelminthes$, the juvenile form resembles the adult.
Reason $R$: Indirect development is observed in $Aschelminthes$.
Which option is correct for Assertion $A$ and Reason $R$?

Sexual dimorphism is found in $:-$

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