The UPSC derives its functions from which of the following sources?1.The Constitution2.Parliamentary Laws3.Executive Rules and Orders4.ConventionsSelect the correct answer from the codes given below:

1. A

   1 and 2

   Option (a) claims that the UPSC derives its functions only from the Constitution and parliamentary laws. However, this is incorrect because the functions of the UPSC are not restricted solely to constitutional provisions and parliamentary statutes, as other sources also apply.

2. B

   1 and 3

   Option (b) claims that the UPSC derives its functions from the Constitution and executive rules and orders. While executive rules do supplement its operations, this option is incomplete because it omits parliamentary laws and conventions.

3. C

   Only 1

   Option (c) claims that the UPSC derives its functions exclusively from the Constitution. Although the Constitution is the primary source under Article 320, parliament, executive orders, and conventions also play a role in shaping its total functional scope, making this option too restrictive.

4. D

   1, 2, 3 and 4

   Option (d) states that the UPSC derives its functions from the Constitution, parliamentary laws, executive rules and orders, and conventions. This is the correct official key because constitutional provisions, parliamentary enactments on extra functions, executive regulations, and established conventions collectively determine the comprehensive jurisdiction and operational framework of the Commission.

Summary. Official key is (d) because the UPSC derives its functions from a combination of constitutional provisions, parliamentary statutes, executive rules, and conventions. While Article 320 of the Constitution lays down its core duties, Parliament can entrust additional functions regarding public services. Furthermore, executive rules and established administrative conventions also contribute to the expansive functional domain of the Commission. Students often mistakenly restrict constitutional bodies solely to organic laws, ignoring supplementary statutes and conventions. Therefore, all four listed sources collectively empower the UPSC.