Correct Answer: Unnecessary

Solution : The correct choice is the fourth option.

Utilitarian refers to something practical or functional, serving a specific purpose efficiently. Its opposite, unnecessary implies something that is not needed or essential in a given context, which contrasts with the utilitarian concept.

The meanings of other options are as follows:

• Evident: Clear, obvious, or easily seen. Something that is evident is readily apparent or visible without much effort.
• Spacious: Having ample space, roomy, or large in area. It describes something that provides a lot of space or room.
• Necessary: Essential, required, or needed. Something that is necessary is crucial or mandatory for a particular purpose or situation.