Which of the following is wrongly matched?

Mention one example each for animals with a chitinous exoskeleton and those covered by a calcareous shell.

Match the following animals with their respective phyla and arrange them in the correct order as per the given list of animals: Animals: $Leucosolenia$,$Opalina$,$Planaria$,$Wuchereria$. Phyla: $Aschelminthes$,$Protozoa$,$Porifera$,$Platyhelminthes$.

The class of phylum Protozoa to which ‘Noctiluca’ belongs is:

The figures $(A-D)$ show four animals. Select the correct option with respect to a common characteristic of two of these animals.

Phylum $Annelida$ resembles $Mollusca$ in embryonic features because both have