What Union Executive and Union Legislature in India are comprised of?

Most of the modern democracies follow the Montesquieu Model of Separation of Powers in which government is divided into three estates viz. executive, legislature and judiciary. Further, the press / media is sometimes called fourth estate because it has considerable influence upon public opinion. While main function of the legislature is to make laws and control finances, main function of executive is to execute or implement the laws. Judiciary is mainly responsible for administration and interpretation of law. For India:

• The Union Legislature is Parliament with its two houses viz. Lok Sabha (Lower House) and Rajya Sabha (Upper House)
• The Union Executive is President, Vice President, Council of Ministers and Attorney General.
• The Union Judiciary is only Supreme Court.

Articles 52 to 78 in Part V of the Constitution deal with the Union executive.