Hi Rachit,
OUI version in stage is 11.2.0.2.0. OUI version expected is 11.2.0.4.0." Exiting with exit code 5
You need to update OUI version from existing 11.2.0.2.0 to 11.2.0.4.0,after that try to run RUNINSTALLER_CHECK to continue the process.
For ref please follow SAP KBA's 2059515 - Oracle 11.2.0: Database Upgrade To Release 11.2.0.4 on Unix with RAC or ASM
819829 - Oracle Instant Client Installation and Configuration on Unix
1798976 - Oracle 11.2.0: Database Upgrade To Release 11.2.0.3 on Unix with RAC or ASM
Hope this will help you.
Regards,
Gaurav