Detailed Explanation:

Answer: Option 3 — It defines and limits the powers of government.

The chief purpose of a Constitution is to define and limit the powers of government, establishing a framework of governance where authority is constrained by fundamental rules and principles. This prevents arbitrary exercise of power and protects citizens' rights by ensuring that governmental actions remain within constitutional boundaries. While a Constitution does serve other purposes—such as determining objectives for legislation, creating political institutions, and promoting social justice—its primary function is to establish limited government by setting clear boundaries on state power.

Evaluation of Options:
❌ Option 1 – Incorrect: While the Constitution does determine objectives (like Directive Principles), this is a secondary function, not the chief purpose.
❌ Option 2 – Incorrect: Creating political offices and government is an important function but not the primary purpose.
✅ Option 3 – Correct: Defining and limiting governmental powers is the fundamental and chief purpose of any Constitution.
❌ Option 4 – Incorrect: Securing social justice is an important goal (found in the Preamble and DPSP) but represents an objective rather than the chief structural purpose.

📝 Short Notes: Chief Purpose of Constitution

• Primary Purpose: A Constitution's chief function is to define and limit the powers of government, establishing the principle of limited government and constitutional rule.
• Constitutionalism: The concept that government must operate within the framework of established laws and principles, preventing arbitrary exercise of power.
• Separation of Powers: The Constitution divides governmental authority among legislature, executive, and judiciary to prevent concentration of power.
• Fundamental Rights: By enshrining rights in the Constitution, citizens are protected from governmental overreach and abuse of authority.
• Rule of Law: The Constitution ensures that all governmental actions must conform to established legal principles and procedures.
• Secondary Functions: While also important, other purposes like setting policy objectives (DPSP), creating institutions, and promoting social goals are supplementary to the core function of limiting power.