What is basic concept of Narco analysis test? How Supreme Court has dealt it in the judgment of Selvi V State of Karnataka?

[Educator]

Narco analysis, also known as a "truth serum" test, involves the administration of certain drugs, to induce a hypnotic or sedated state in which the subject is believed to be more likely to reveal truthful information. The subject is then interrogated in this state, with the aim of obtaining information that might be concealed when they are fully conscious.In the context of Indian law