Use the crsctl query crs activeversion command to display the active version and the configured patch level of the Oracle Clusterware software running in the cluster. During a rolling upgrade, however, the active version is not advanced until the upgrade is finished across the cluster, until which time the cluster operates at the pre-upgrade version.
Additionally, during a rolling patch, the active patch level is not advanced until the patching is finished across the cluster, until which time the cluster operates at the pre-upgrade patch level.