Was the whole Arabian Peninsula ever conquered by any nation?

No, the Arabian Peninsula was never completely conquered by any single nation or empire before or after the first few centuries of Islam (although the rulers of Mecca and Medina would continue to give allegiance to whatever dominant Islamic power existed at the time, on behalf of the Hejaz). read more

The Arabian Peninsula has been the location of many conflicts,some of the worlds oldest cities and has been conquered multiple times. The correct option among all the options that are given in the question is the last option or option "D". read more