___________ is a collection of rules and regulations which helps to run a country on the basis of common things on which citizens are agreed.

constitution

The correct answer is Option 1 - constitution

A constitution is indeed a collection of rules and regulations that establish the framework for governance and define the fundamental principles, rights, and duties of citizens within a country. It serves as the supreme law of the land, providing the foundation for the organization of government, the distribution of powers, and the protection of individual liberties. The constitution helps to ensure stability, order, and the rule of law by setting forth a common set of principles on which citizens agree to be governed.