Which of the following does NOT belong to Arthropoda group of animal kingdom?

Octopus

The correct answer is Option (3) – Octopus

Out of the listed animals, the one that does NOT belong to the Arthropoda group is: Octopus

Here's why:

• Butterfly, cockroach, and spider are all examples of arthropods. They share key characteristics of the phylum Arthropoda, including a segmented body, jointed legs, and a hard exoskeleton.
• Octopuses, on the other hand, are classic examples of mollusks. They have a soft body, a mantle that secretes a shell (which may be internal or absent in some species), and a muscular foot for locomotion. They are intelligent invertebrates known for their eight arms and problem-solving abilities.