The correct options are
A At least 6% vote share in the last assembly or Lok Sabha polls in at least four states
B At least four seats in the last Lok Sabha polls
The criteria to be met by national political parties is that they have to garner at least 6% vote share in the last assembly or Lok Sabha polls in at least four states. In addition to this, they should get at least four seats in the last Lok Sabha polls.