The correct answer is option D) Executive Body.

Explanation:
The National Development Council (NDC) is a high-level body in India that works as an Executive Body. Let's understand what an Executive Body is and why the NDC falls under this category.

Executive Body:
- An Executive Body is a government body or agency that is responsible for implementing policies, laws, and regulations.
- It is tasked with the execution and administration of various developmental activities and programs.
- Executive bodies are responsible for making decisions, managing resources, and coordinating the implementation of policies to achieve specific objectives.

National Development Council (NDC):
- The NDC is a body that was established in India in 1952 under the Government of India's resolution.
- It is the apex body for decision-making and deliberations on development matters in the country.
- The NDC consists of the Prime Minister, Union Cabinet Ministers, Chief Ministers of all states, and administrators of Union Territories.
- Its main objective is to serve as a forum for coordination and consensus-building on development policies and programs between the center and the states.
- The NDC plays a crucial role in formulating and implementing development plans and policies.

Functions of the NDC:
1. Formulating Five-Year Plans: The NDC plays a key role in formulating the Five-Year Plans, which are comprehensive economic development plans for the country.
2. Approving Plan Outlays: It approves the plan outlays and allocation of resources for various sectors and programs.
3. Policy Formulation: The NDC formulates policies and guidelines for sectors like agriculture, industry, infrastructure, education, health, etc.
4. Reviewing Progress: It reviews the progress of ongoing development programs and projects and suggests corrective measures if required.
5. Coordination and Cooperation: The NDC promotes coordination and cooperation between the central and state governments in matters of development.

In conclusion, the National Development Council (NDC) is an Executive Body in India. It plays a vital role in formulating development plans, approving outlays, formulating policies, and coordinating development activities between the center and the states.