Explanation:

Here’s the thing—when you’re looking for the Article that actually spells out what the Union and State Public Service Commissions do, it’s Article 320. Let’s break down those options so it’s super clear:

- Article 320

- This is the winner. It covers the duties and functions of both the Union Public Service Commission (UPSC) and the State Public Service Commissions (SPSC). It lists what cases they must be consulted in, like recruitment, disciplinary matters, and appointments.

- Article 312

- This one is about the creation of All-India Services (like IAS, IPS) if Parliament decides there should be new ones.

- Article 308

- Sets the stage for the scope of Part XIV of the Constitution, basically about the general provisions regarding Public Service Commissions, but not their actual functions.

- Article 316

- Talks about the appointment and term of office for the members of the Public Service Commissions—not their duties.