An administrator deploys PA-500 NGFWs as an active/passive high availability pair. The devices are not participating in dynamic routing, and preemption is disabled.
What must be verified to upgrade the firewalls to the most recent version of PAN-OSֲ® software?
To upgrade PA-500 NGFWs that are deployed as an active/passive high availability pair to the most recent version of PAN-OS software, it is imperative to verify the Applications and Threats update package. This ensures that the firewall's threat prevention mechanisms are up to date, which is crucial for network security during and after the upgrade process.
Should be B
B https://docs.paloaltonetworks.com/pan-os/9-0/pan-os-new-features/upgrade-to-pan-os-90/upgrade-the-firewall-to-pan-os-90/upgrade-an-ha-firewall-pair-to-pan-os-90.html#idab14f5f2-f662-4e5c-ba5b-2cc35993e2ec step 3. number 1
Before upgrade you should check App and Threat update package version or update it to the latest one
B https://docs.paloaltonetworks.com/pan-os/10-2/pan-os-upgrade/upgrade-pan-os/upgrade-the-firewall-pan-os/upgrade-an-ha-firewall-pair
B is correct