Explanation
The Battle of Yermuk was fought between Muslims and Romans. This answer is correct because the Battle of Yermuk, which took place in 636 AD, was a pivotal battle where the Muslim Arab army defeated the Byzantine Roman Empire, marking a significant expansion of Islamic rule. The QuizMaster of AnsweringExams.Com suggests remembering this battle by associating it with the number 636, which can be recalled by thinking of the June 6 date, a memorable day in history. Other options are incorrect because historical records clearly indicate the Byzantine Roman Empire as the opposing force, not Jews, Iranis, or a vague reference to Christians, which would be too broad given the context. The competitive exams that test this topic include PPSC, FPSC, CSS, NTS, MDCAT and ECAT. Practice more at AnsweringExams.Com.