The following characters are applicable to which phylum?

a) Hooks & suckers are present in parasitic forms.

b) Some of them absorb nutrients from the host directly through their body surface.

c) Fertilisation is internal and development is through many larval stages.  

• A

  Platyhelminthes   

• B

  Aschelminthes   

• C

  Annelida   

• D

  Mollusca