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a) Cognizable offence is one where a police officer could arrest a person without warrant, whereas in non-cognizable offence warrant is necessary.

b) Bailable offence is of lesser severity and the accused can demand release on bail.  Non-bailable offence is of severe nature and bail cannot be demanded as a matter of right.

c) As far as Companies Act 2013 is concerned, only offences covered u/s 447 relating to fraud are cognizable [Sec.212(6)].  All  other offences under the Act are non-cognizable [Sec.439(1)].