Option (1) is incorrect: Under Article 20(1), no person shall be convicted of any offence, except for violation of the law in force at the time of the commission of the act charged as an offence.
Option (2) is incorrect: Under Article 22, no person who is arrested shall be detained in custody without being informed.
Option (3) is correct: Article 20(3) embodies that no person accused of any offence shall be compelled to be a witness against himself.
Option (4) is incorrect: Under Article 20(2), no person shall be prosecuted and punished for the same offence more than once.