Explanation:

• A unique feature of the All India Services is that the members of these services are recruited by the Center(Union government in federal polity), but their services are placed under various State cadres, and they have the liability to serve both under the State and under the Centre. Due to the federal polity of the country, this is considered one of the tools that makes union government stronger than state governments.
• The National Development Council (NDC) or the Rashtriya Vikas Parishad is the apex body for decision making and deliberations on development matters in India, presided over by the Prime Minister. It was set up on August 6, 1952 to strengthen and mobilize the effort and resources of the nation in support of the Plan, to promote common economic policies in all vital spheres, and to ensure the balanced and rapid development of all parts of the country. The Council comprises the Prime Minister, the Union Cabinet Ministers, Chief Ministers of all States or their substitutes, representatives of the union territories and the members of the Commissions. It is not a Constitutional body
• The Inter-State Council was set up under Article 263 of the Constitution of India by the President in 1990.
• Grant-in-aid is provided by the Union government under Article 275.