Corrections made, thanks. We take names containing apostrophes to be single words, in the same way that don't is considered one word. Srijayapura no longer works, but quite a few alternate spellings of SJK are still accepted.
I don't consider SJK is a capital city! Parliament is located 9 km / 5 miles from downtown Colombo in the suburb of Sri Jayewardenepura Kotte, which in my book makes Colombo the capital. Several publications, including Britannica,
Free Dictionary agree. But other publications say that Colombo and SJK are both capitals: SJK the legislative one, and Colombo the commercial, judicial and executive one, for example the CIA Factbook and Wikipedia. This quiz simply acknowledges that latter point of view.
Washington, D.C. is two words. When we visit, we hear local people calling it either "Washington, D.C" or the shortening, "D.C.". I've seen your comment about the capital being called "Washington" but that's incorrect. Washington can easily be confused with the State Washington, so people call the state "Washington State" and the city "Washington, D.C.". Just information from a person who goes to D.C. often :)
District of Columbia is the federal district bordered by Virginia and Maryland, and Washington is the city that wholly occupies that district. US Americans routinely describe their cities in the style of [cityname], [statename], thus Cheyenne, Wyoming; Tulsa, Oklahoma; Chicago. Illinois; and, in this case, Washington, DC. (Also, as an aside, District of Columbia is three words, not one)
Don't know if it's deliberate or not but fortunately you can get away with typing just Srijayapura and not the full name ;)
Lonely Planet and
Free Dictionary agree. But other publications say that Colombo and SJK are both capitals: SJK the legislative one, and Colombo the commercial, judicial and executive one, for example the CIA Factbook and Wikipedia. This quiz simply acknowledges that latter point of view.