The correct option is A 2017
The Zimbabwe African National Union – Patriotic Front (ZANU–PF) removed Robert Mugabe as the leader of the party on November 19, 2017 and asked him to resign by November 20, 2017. He initially refused to resign. Then, on November 21, 2017, Mugabe handed over his resignation letter after a joint session of Parliament came together for his impeachment.