Which one of the following incorrect matching?

	Genus name	Two characters	Phylum
1	Pila	Body is segmented; mouth with radula	Molluscs
2	Asterias	Spiny skinned; water vascular system	Echinodermata
3	Sycon	Pores; canal system	Porifera
4	Periplaneta	Jointed appendages; chitinous exoskeleton	Arthropoda

• A

  1

• B

  2

• C

  3

• D

  4