A. Unlike true jellies, this class is equipped with as many as two dozen "true" eyes paired around
the circumference of their bells. [Select]

Cubozoans or the box jellies

Explanation:

These cubozoan or the box jellies is the second class of cnidaria comprising the classic jellyfish. The first class are the Scyphozoans, or "true jellies. The box jellies have as many as two dozen eyes that are not primitive, light-sensing patches of cells but are true eyeballs that are made up of lenses, retinas and corneas. These eyes are paired around the circumference of their bells giving them a 360-degree range of vision. They function in detection of prey and predator and also mainly to maintain the box jelly orientation in water.

answer; ///(b) it is composed of four protein chains and four heme groups;