Daughter of Hazrat Umar (R.A) who married to Prophet (PBUH) was:

a) Hazrat Ayesha (R.A)

b) Hazrat Hafsa (R.A)

c) Hazrat Khadija (R.A)

d) None of these

Hazrat Hafsa (R.A), the daughter of Hazrat Umar (R.A), was married to Prophet (PBUH). She (R.A) was born in Makkah five years before Nubuwwat. You may also like to know about the first Islamic Battle.