Indian Polity · Polity

Consider the following statements regarding Narco Analysis Tests in India: I. The Supreme Court (in Selvi v. State of Karnataka) held that no individual can be subjected to narco analysis, polygraph, or brain-mapping tests involuntarily. II. Any information subsequently discovered with the help of voluntarily administered test results can be admitted as evidence under Section 27 of the Evidence Act. III. Narco analysis involves the intravenous administration of a controlled barbiturate drug like sodium pentothal to lower mental inhibitions. IV. The right against self-incrimination under Article 20(3) of the Constitution applies to individuals at the investigative stage, even if they are not formally named as an accused in a FIR. How many of the above statements are correct?