There is never a sole charge of S.120B.  S.120B is inserted along with some other section / offence i.e the accused conspired to commit______. So it should depend upon the main offence charged with.
 

You may find the list of Compoundable Offences u/s.320 Cr.P.C. Section 120-B is not compoundable.

120b is a substantive offence

there is a cse registered under section 120(B)and 114 of IPC the alligation is that there was a consperacy to commit a murder but police have not involved section 307 in FIR whether the bail application can file under section 437 or it should be filed under section 439 in sessions court..?

Now all my friends please note this judgement where Delhi high court held 120b ipc as compoundable..........

2007 Cr.L.J 1641 Jitendra rana vs State