Name the wife of the Holy prophet (SAW) who was titled as Umm-ul-Masakeen?

Name the wife of the Holy prophet (SAW) who was titled as Umm-ul-Masakeen?

A. Hazrat Ummay Habiba (RA)
B. Hazrat Ummay Salma (RA)
C. Hazrat Zainab (RA)
D. Hazrat Zainab Bint-t-Jahsh