Who was the sister of Ameer Muawiya (R.A.) who also held the title Ummul Momineen?

Explanation

The correct answer is Hazrat Ummay Habiba (R.A.), who was the sister of Ameer Muawiya (R.A.) and was honored with the title Ummul Momineen. The other options—Hazrat Ummay Salma (R.A.), Hazrat Safia (R.A.), and Hazrat Javeria (R.A.)—were also wives of the Prophet Muhammad (PBUH) but were not related to Ameer Muawiya (R.A.) as siblings.