S. 276C : Offences and prosecutions – Wilful attempt to evade tax- The burden of proving the absence of mens rea is upon the accused and such absence needs to be proved not only to the basic threshold of “preponderance of probability” but “beyond reasonable doubt”. In every prosecution case, the Court shall always presume culpable mental state and it is for the accused to prove the contrary beyond reasonable doubt. This presumption is a rebuttable one- Petition to quash the proceedings was dismissed .[ S.133A, 271(1) (c ), 277, 278E, Cr.P.C. S.561A ]