The correct answer is Statement (b) is correct Explanation & Key Takeaways: Protection in Respect of Conviction for Offences • Article 20 grants protection against arbitrary and excessive punishment to an accused person, whether a citizen or foreigner or a legal person like a company or a corporation. It contains three provisions in that direction: No ex-post-facto law: No person shall be • Convicted of any offence except for violation of a law in force at the time of the commission of the act, nor • Subjected to a penalty greater than that prescribed by the law in force at the time of the commission of the act. No double jeopardy: • No person shall be prosecuted and punished for the same offence more than once (Exclude Departmental proceedings). Hence statement a is incorrect. No self-incrimination: No person accused of any offence shall be compelled to be a witness against himself. No self-incrimination • The protection against self-incrimination extends to both oral evidence and documentary evidence. Hence statement b is correct. • Self-incrimination does not extend to the Compulsory production of material objects, • The compulsion to give thumb impressions, specimen signatures, blood specimens, and • Mandatory exhibition of the body. • It extends only to criminal proceedings and not to civil proceedings or proceedings that are not criminal. Hence statement c is incorrect.