If you fail in sybcom can i appear for tybcom?

No, you cannot appear for the TYBCom (Third Year Bachelor of Commerce) exam if you fail in SYBCom (Second Year Bachelor of Commerce). Typically, you need to successfully complete all previous years' exams to progress to the next level in your degree program. However, policies can vary by institution, so it's best to check with your specific college or university for their rules regarding exam eligibility.