In which of the following haemocyanin pigment is found:
1.  Annelida
2.  Echinodermata
3.  Insecta
4.  Lower Chordata

In contrast to Annelids, Platyhelminths show:
1. Absence of body cavity
2. Presence of pseudocoelom
3. Radial symmetry
4. Bilateral symmetry