Which of the following is the correct position in law regarding administration of narco-analysis techniques, in the light of the judgment in Selvi v. State of Karnataka, (2010) 7 SCC 263?
1. Compulsory administration constitutes cruel, inhuman or degrading treatment in the context of Article 21.
2. Compulsory administration violates the right against self-incrimination under Article 20(3).
3. Compulsory administration may, however, be justifiable in compelling public interest in combatting terrorist activities.
4. Information subsequently discovered with the help of voluntarily administered narco-analysis results may be admitted in evidence.
Select the correct answer from the following: