Octopus belongs to the class?

Pelecypoda

Mollusca

Cephalopoda

None of these

A cephalopod is any member of the molluscan class Cephalopoda such as a squid, octopus, cuttlefish, or nautilus.

Class: Cephalopoda; Cuvier, 1797

Scientific name: Cephalopoda

Domain: Eukaryota

Kingdom: Animalia