Correct Answer: Reality

Solution : The correct choice is the third option .

Notion means a belief about something whereas reality means the state of things as they actually exist.

The meanings of the other options are as follows:

• Quotient refers to the result of division and is not the opposite of "notion" in this context.
• Law is unrelated to the concept of democracy and doesn't serve as the opposite of "notion".
• Portion does not convey the opposite meaning of "notion" in this context.