The correct answers are A and B.
The exhibit shows:
override: disable
both members are currently in-sync
only port7 appears under HBDEV stats, so it is the active heartbeat interface the cluster is in HA A-P mode Why A is correct:
With override disabled, after a failover the new primary keeps that role when the old primary comes back. The FortiOS administration guide states:
"When the primary FortiGate rejoins the cluster the secondary FortiGate continues to operate as the primary FortiGate." So if FGVM...649 reboots and FGVM...650 becomes primary, FGVM...650 will remain primary after FGVM...649 rejoins.
Why B is correct:
The study guide states:
"When FortiGate devices configured in an HA cluster lose communication with each other on the heartbeat interface, each FortiGate assumes the role of the primary device." The exhibit shows only port7 as the heartbeat device in HBDEV stats So if port7 is disconnected and heartbeat communication is lost, the cluster can enter a split-brain condition, where both units believe they are primary. The FortiOS administration guide confirms the same behavior: loss of heartbeat communication causes each member to think it is the primary Why the other options are wrong:
C is wrong because configuration synchronization status is specifically used to detect whether secondary members remain synchronized with the primary. If members are no longer synchronized, the status changes from in-sync to out-of-sync D is wrong because the study guide explains that during a configuration change, checksums may differ briefly while changes are copied, but it does not describe this as the secondary initiating a "synchronization reset" So the verified answers are: A, B.

* FortiGate HA Troubleshooting and Synchronization Guides
* Fortinet Admin Guide: HA Primary Role Retention, Cluster Break-up Due to Out-of-Sync Status

The correct answer is C.
The exhibit shows the neighbor state as Connect in the State/PfxRcd column. The study guide explains the BGP states exactly as follows:
"Connect: Waiting for a successful three-way TCP connection"
"OpenSent: Waiting for an OPEN message from the peer"
"Established: Peers have successfully exchanged OPEN and keepalive messages" Because the router is still in Connect state, the TCP three-way handshake has not completed yet. In practical terms, the local router has sent the TCP SYN but has not successfully received the SYN/ACK needed to complete the handshake. That is why C is correct.
Why the other options are wrong:
A is wrong because the message counters alone do not prove that the neighbor is unreachable. The study guide says the State/PfxRcd field shows the BGP state when the session is not established, and here that state is specifically Connect B is wrong because waiting for an OPEN message happens in OpenSent, not Connect D is not the best answer for this output. The study guide ties the displayed state directly to the protocol phase: Connect means the device is still waiting for a successful TCP handshake So the verified answer is: C.