How does Iran differ from most of the region?

1.It is mostly Christian
2.It is mostly Jewish
3.It is mostly Shia Muslim
4. It is mostly Sunni Muslim

The correct answer is:

3. It is mostly Shia Muslim

Iran stands out from most of the region because the majority of its population adheres to Shia Islam, while most countries in the Middle East have a majority of Sunni Muslims.