Explanation

Hazrat Sa’d bin Abi Waqas (R.A) is historically associated with the early Islamic conquests including Iraq. Hazrat Umar (R.A) was a major Caliph and leader but not primarily known for conquering Iraq in this context. Hazrat abu ubeda bin jirrah (R.A) is known for his role in Medina. Hazrat Abu Huraira (R.A) is famous for his hadith narration.