Concept:The 1959 Nigerian general election was contested by three major political parties.Explanation:The three main parties that took part were the Action Group (AG), the National Council of Nigeria and the Cameroons (NCNC), and the Northern People's Congress (NPC).No single party won an outright majority in that election.As a result, the NCNC and NPC formed a coalition government.The AG, which had the remaining seats, became the opposition or "watchdog" party.Answer:AG, NCNC, NPCThat is option D.