What are the names of the four caliphs in Islam?

Rashidun, (Arabic: “Rightly Guided,” or “Perfect”), the first four caliphs of the Islamic community, known in Muslim history as the orthodox or patriarchal caliphs: Abū Bakr (reigned 632–634), ʿUmar (reigned 634–644), ʿUthmān (reigned 644–656), and ʿAlī (reigned 656–661)

Explanation:

Rashidun, (Arabic: “Rightly Guided,” or “Perfect”), the first four caliphs of the Islamic community, known in Muslim history as the orthodox or patriarchal caliphs: Abū Bakr (reigned 632–634), ʿUmar (reigned 634–644), ʿUthmān (reigned 644–656), and ʿAlī (reigned 656–661)

Explanation:

it should be a. song dynasty’s civil service examination system created an administrative bureaucracy manned by the landed aristocracy.

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