I think the correct answer should be "Drop"
The difference between deny and drop is that deny will make a router (or other device) send an ICMP type 3 (destination unreachable) message response back, where drop will not notify the sending party that the device has be denied and just silently drop the traffic.
Answer is A
https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-admin/policy/security-policy/security-policy-actions
Drop
Silently drops the traffic; for an application, it overrides the default deny action. A TCP reset is not sent to the host/application.
It can't be Reset-Server as it is only after a session has been established.
Though A.Drop would be my first choice here because traffic simply discarded without notifying the sender, option "Reset Server" notifies only Server side to close the socket meanwhile Client in unaware of the action.
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DilT
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