Which pair of OSPF network types are compatible and will allow adjacency between two peers?

OSPF adjacency can form between a broadcast and a nonbroadcast network type if the nonbroadcast router is explicitly configured with its neighbor's IP address using the neighbor command. This manual configuration allows the nonbroadcast router to send unicast hellos to the broadcast router, overcoming the nonbroadcast nature which typically requires a designated router (DR) and backup designated router (BDR) election process that is absent in nonbroadcast networks unless neighbors are defined. Incorrect options: point-to-multipoint to nonbroadcast: These are incompatible because point-to-multipoint expects to send hellos to multiple neighbors, while nonbroadcast requires explicit neighbor configuration and unicast hellos. point-to-multipoint to broadcast: These are incompatible because point-to-multipoint does not elect a DR/BDR, while broadcast networks rely on DR/BDR elections for adjacency formation. broadcast to point-to-point: These are incompatible because point-to-point links do not elect DR/BDRs and expect only one neighbor, whereas broadcast networks require DR/BDR elections and can have multiple neighbors.