What is the capital city of Saudi Arabia?

The correct answer is Riyadh, which has served as the capital of the Kingdom of Saudi Arabia since the modern state's unification in 1932 under King Abdulaziz ibn Saud. Riyadh sits in the central Najd region and today functions as the country's seat of government, housing the royal court, the Council of Ministers, and the headquarters of most federal ministries and major state institutions, in addition to being the kingdom's largest city by population. Riyadh is correct precisely because administrative and political capital status in Saudi Arabia is legally and functionally tied to this city, not to any city holding religious significance. Jeddah is incorrect because, although it is a major Red Sea port and commercial hub often called the country's gateway for pilgrims arriving by sea and air, it has never held the status of national capital. Mecca is incorrect because, despite being Islam's holiest city and the site of the annual Hajj pilgrimage, it carries only religious importance and no administrative authority. Medina is incorrect for a similar reason: it is Islam's second-holiest city, home to the Prophet's Mosque, but it too has no governmental function. The most common exam confusion here is candidates equating religious prominence with political capital status, since Mecca and Medina receive far greater media and cultural attention than Riyadh in everyday discourse. A useful revision takeaway is to remember the pairing firmly: Riyadh governs, while Mecca and Medina are venerated, and Jeddah trades and connects the kingdom to the wider world by sea and air.