I received below response from BPM certification team.
1) So Oracle BPM 10G will not support both Sybase 16 or Oracle 12C? - Correct
2) So any version of Oracle BPM even 12.1.3 (latest) does not support Sybase16 database connectivity? - Correct
3) Oracle BPM 12C will support Oracle 12C? - Correct . So is there a way we can connect to Oracle 12C or Sybase 16 from Oracle BPM 10G using "Generic JDBC Version 1" option?