The steps for OSPF to begin routing packets are

Hello packet exchange + neighbor adjacency -> LSA exchange -> LSDB synchronization -> OSPF routing table calculation -> OSPF routing 

LSA exchange -> LSDB synchronization -> Hello packet exchange -> OSPF routing table calculation -> OSPF routing 

Hello packet exchange -> LSA exchange -> LSDB synchronization -> OSPF routing -> OSPF routing table calculation 

None of these