Question

why are the first four caliph called khulafa-e-rashideen (R.A)?​

Answer 1

The Rashidun Caliphs (Rightly Guided Caliphs; Arabic: الخلفاء الراشدون‎ al-Khulafāʾu ar-Rāshidūn), often simply called, collectively, "the Rashidun", is a term used in Sunni Islam to refer to the 30-year reign (632–661) of the first four caliphs (successors) following the death of the Islamic prophet Muhammad, namely: ...