Umm-ul-Masakeen was the title given to one of the wives of the Prophet (PBUH):

A) Hazrat Sauda (RA)

B) Hazrat Zainab bint Jahsh (RA)

C) Hazrat Zainab bint Khuzaima (RA)

D) Hazrat Safia (RA)

Answer: C

Explanation: Hazrat Zainab bint Khuzaima (R.A) was called Umm-ul-Masakeen (mother of the poor) for her generosity.