Among the following animals, which one produces the smallest egg?

In which of the following is external fertilization observed?

In which one of the following is the genus name,its two characters,and phylum $NOT$ correctly matched?

Which of the following is considered a living fossil?

Which of the following is common between Annelida and Arthropoda?

Match the animals listed under Column-$I$ with their respective zoological names given under Column-$II$; choose the answer that provides the correct combination of the alphabets of the two columns.
Column-$I$ (Common Name) | Column-$II$ (Zoological Name)
$A$. Starfish | $p$. Sepia
$B$. Jellyfish | $q$. Astropecten
$C$. Devilfish | $r$. Aurelia
$D$. Cuttlefish | $s$. Octopus