Maybe it's obvious to people familiar with OSPF, but
x.x.185.157 and 10.3.50.254 are C.
192.168.2.1 and y.y.194.114 and 10.3.50.253 are B.
10.1.0.253 and 10.2.31.254 are A.
On B:
clarknova@RTR-Audits:~$ show ip ospf neighbor
Total number of full neighbors: 1
OSPF process 0 VRF(default):
Neighbor ID Pri State Dead Time Address Interface Instance ID
x.x.185.157 1 ExStart/DR 00:00:40 10.3.50.254 eth3 0
10.2.31.254 1 Full/Backup 00:00:31 10.4.21.253 eth4.421 0
clarknova@RTR-Audits:~$ show ip ospf database
OSPF Router with ID (192.168.2.1) (Process ID 0 VRF default)
Router Link States (Area 0.0.0.0)
Link ID ADV Router Age Seq# CkSum Link count
10.2.31.254 10.2.31.254 995 0x800067b1 0x7453 5
x.x.184.202 x.x.184.202 1780 0x800002d5 0x6c3e 1
192.168.2.1 192.168.2.1 1153 0x80000b0a 0xba77 5
Net Link States (Area 0.0.0.0)
Link ID ADV Router Age Seq# CkSum
10.1.0.253 10.2.31.254 305 0x80003366 0x0189
10.4.21.254 192.168.2.1 1083 0x80000a08 0x768d
Area-Local Opaque-LSA (Area 0.0.0.0)
Link ID ADV Router Age Seq# CkSum Opaque ID
1.0.0.1 192.168.2.1 1063 0x80000126 0x65ca 1
1.0.0.30 192.168.2.1 1113 0x80000124 0x629d 30
AS External Link States
Link ID ADV Router Age Seq# CkSum Route Tag
10.1.1.0 x.x.184.202 299 0x800002d6 0x936d E2 10.1.1.0/24 0
10.1.22.0 x.x.184.202 259 0x800002d5 0xad3f E2 10.1.22.0/24 0
10.1.23.0 x.x.184.202 469 0x800002d5 0xa249 E2 10.1.23.0/24 0
10.1.31.0 x.x.184.202 39 0x800002d6 0x489a E2 10.1.31.0/24 0
x.x.191.4 x.x.184.202 309 0x8000001c 0xeac4 E2 x.x.191.4/32 0
y.y.194.114 192.168.2.1 1213 0x800009a3 0xd03d E2 y.y.194.114/31 0
y.y.195.64 192.168.2.1 873 0x800009a6 0x0159 E2 y.y.195.64/27 0
192.168.2.0 192.168.2.1 573 0x800009a5 0x7d9b E2 192.168.2.0/24 0
On C:
clarknova@RTR-Hillside:~$ show ip ospf neighbor
Total number of full neighbors: 0
OSPF process 0 VRF(default):
Neighbor ID Pri State Dead Time Address Interface Instance ID
192.168.2.1 1 ExStart/Backup 00:00:34 10.3.50.253 eth4 0
clarknova@RTR-Hillside:~$ show ip ospf database
OSPF Router with ID (x.x.185.157) (Process ID 0 VRF default)
Router Link States (Area 0.0.0.0)
Link ID ADV Router Age Seq# CkSum Link count
x.x.185.157 x.x.185.157 30 0x80000025 0x9d47 7
AS External Link States
Link ID ADV Router Age Seq# CkSum Route Tag
x.x.185.157 x.x.185.157 1540 0x8000001f 0x4dd7 E2 x.x.185.157/32 0
x.x.191.4 x.x.185.157 460 0x80000020 0x09ae E2 x.x.191.4/32 0