Which statements are true regarding the above output?

Examine the output of the ‘get router info ospf interface’ command shown in the exhibit; then answer the question below.

Which statements are true regarding the above output? (Choose two.)
A . The port4 interface is connected to the OSPF backbone area.
B . The local FortiGate has been elected as the OSPF backup designated router.
C . There are at least 5 OSPF routers connected to the port4 network.
D . Two OSPF routers are down in the port4 network.

Answer: A,C

Explanation:

on BROADCAST network there are 4 neighbors, among which 1*DR +1*BDR. So our FG has 4 neighbors, but create adjacency only with 2 (with DR and BDR). 2 neighbors DRother (not down).