Which of the following is the most fundamental principle of a democratic government?
Correct: C
The most fundamental principle of a democratic government is the 'Rule of law and respect for citizens' rights'. Democracy ensures that the government functions within the framework of a constitution and law, and that all citizens, including those in power, are subject to the same laws. It also guarantees fundamental rights to its citizens. The other options describe non-democratic systems: rule by a single leader (dictatorship), hereditary monarch (monarchy), or state control of the economy (socialist/communist state, not inherently democratic principle).