Are Iranians considered Asian or white?

Whenever I have to write down my ethnicity, I always hesitate. I'm Persian (Iranian) and I have olive skin. Iran is in Asia, but my dad says my race is white/aryan, and another person told me Asians are only people from East Asia. Others told me Asian=anyone from the entire continent of Asia. There is no option for "Middle Eastern."

I know this is a pointless question. You're probably like, "who cares? Just put something"
But I really need to know.