A. Hazrat Ali (R.A.)
B. Hazrat Abu Bakar (R.A.)
C. Hazrat Usman (R.A.)
D. Hazrat Umar (R.A.)
1. Hazrat Abu Bakar was the first caliph after Holy Prophet.
2. Second caliph Hazrat Umar(R.A.)
3. Third Caliph Hazrat Usman(R.A.)
4. fourth Calip Hazrat Ali (R.A.)