Select incorrect statement:
Actinides with 5f1, 5f5 and 5f8 electronic configuration are not known.
Lanthanides with 4f2 and 4f8 electronic configuration are not known.
Lanthanoid compounds are less basic than actinoid compounds.
Lanthanoid compounds have more tendency towards complex formation.
Due to low charge density, lanthanoid have less tendency to form complex. The tendency to form complexes and their stability increases with increasing atomic number.