The offence of tampering with computer source documents is ___________.

Correct option is B

The correct option is  (b) Cognisable and bailable.
Explanation
· The offence of  tampering with computer source documents, under Section 65 of the Information Technology (IT) Act, 2000, is classified as a  cognizable and  bailable offence.
· An offence is  cognizable if the police are authorized to arrest the suspect without a warrant.
· An offence is  bailable if the accused person has a right to be released on bail, as the maximum punishment for this offence is imprisonment up to three years. 
Additional Knowledge:
· (a) Non cognisable and bailable: This is incorrect because the offence under Section 65 IT Act is a  cognisable offence, not non-cognizable.
· (c) Non cognisable and non bailable: This is incorrect as the offence is both cognizable and bailable, not non-cognizable and non-bailable.
· (d) Cognisable and non bailable: This is incorrect because while the offence is cognizable, it is classified as  bailable, not non-bailable.