Annelida possess a closed circulatory system. They have a muscular pumping hearts. The blood moves through the capillaries to be carried to the cells of the body.
Platyhelminthes does not have a circulatory system. They have limited way to carry oxygen to the rest of the cells of the body.
Nematoda also does not have a circulatory system but possess a complete digestive system. They use diffusion in order to breathe.
Answer - Option 2 - Annelida