Multiple choice general knowledge Knock knock! Who's there? Mark Boucher. Mark Boucher, who is that? Painter Rap artist Author; wrote "I, Robot" Sportsperson Reveal answer Fill a bubble to check yourself D Correct answer Explanation Mark Boucher is a former South African cricketer who played as a wicket-keeper. He is a sportsperson, not a painter, rap artist, or the author of 'I, Robot' (which was written by Isaac Asimov). The correct answer identifies him as a sportsperson.