Step 1: Issue before the Court.
The Supreme Court examined custodial safeguards and prevention of custodial violence during interrogation and detention.
Step 2: Judicial directions.
In {Paramvir Singh Saini v. Baljit Singh}, the Court directed installation of CCTV cameras with audio-video recording in all police stations and also in offices of agencies where interrogation and detention occur in a manner similar to police stations.
Step 3: Purpose of the directions.
The directions aim to ensure transparency, accountability, and protection of human rights of accused persons.
Step 4: Conclusion.
Therefore, the correct answer is (B) Paramvir Singh Saini v. Baljit Singh.