The question asks for the essential pre-requisites of a sound institutional structure that supports economic development. Let's analyze the components:

Identifying Key Institutional Pre-requisites

• A. Property rights and legally binding contracts: These are fundamental. Secure property rights encourage investment and efficient resource use. Legally binding contracts ensure predictability and facilitate transactions, forming the bedrock of economic activity.
• B. Regulatory Institutions: Effective regulatory bodies are crucial for enforcing laws, ensuring fair competition, protecting consumers and the environment, and managing market failures. They provide the framework within which economic actors operate.
• C. Free market institutions: While markets are vital for economic development, the emphasis here is on the *institutional structure*. A sound structure *enables* markets to function, rather than being solely defined by "free market institutions." Often, successful markets require regulation (covered under B).
• D. Institutions for macroeconomic stability: Predictable macroeconomic conditions (like stable inflation, manageable debt, and stable currency) are essential for long-term planning, investment, and overall economic confidence.

Determining the Core Requirements

A strong institutional structure requires clear rules (property rights, contracts), mechanisms for enforcement (regulatory institutions), and a stable operating environment (macroeconomic stability). While markets (C) are the arena where economic activity happens, they thrive within the framework provided by A, B, and D. Therefore, A, B, and D are considered the primary pre-requisites for establishing the foundational institutional structure.

Conclusion on Pre-requisites

Based on the analysis, the main pre-requisites for a sound institutional structure for economic development are Property rights and legally binding contracts (A), Regulatory Institutions (B), and Institutions for macroeconomic stability (D).

Selected Correct Option

The option that includes A, B, and D is the correct choice.