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Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) · Cisco
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OSPF network types are compatible when hello/dead timers match. Broadcast (10/40) pairs with point-to-point (10/40). That's the only compatible cross-type pairing in the options given.
Both B and C are correct, you have to adjust hello intervals though
Point-to-Multipoint ↔ Broadcast Compatibility: Point-to-Multipoint sends OSPF Hellos using multicast (224.0.0.5). Broadcast network type also uses multicast Hellos. Thus, they can form OSPF adjacencies without additional configuration. Why the other options are incorrect: A. point-to-multipoint to nonbroadcast → Non-broadcast doesn't send multicast Hellos; requires manual neighbor configuration (incompatible by default). B. broadcast to nonbroadcast → Same issue; non-broadcast expects static neighbor configs. D. broadcast to point-to-point → Point-to-point doesn't elect DR/BDR; can mismatch expectations with Broadcast.