BIND conditional forwarding

Hello All,

I am having BIND 9 on RHEL7.

I have configured my bind servers to forward the query to specific zones to internal AD DNS. However there are some records for that zones which are not in AD DNS but present on public DNS (google).
When clients querying for that record, bind is sending the request to AD DNS and due to recursive allowed AD DNS sending back to BIND. hence getting into loop.

Is there any way to configure and serve such request? I want to forward the query to public DNS if any query is coming from AD DNS to bind.
Can we configure conditional forwarders based on source instead of zones?
Thanks.

Regards,
Gyan