Multiple choice general knowledge science & technology Pick the odd one out. Alan Cooper John Backus Dave Grohl Grace Hopper Reveal answer Fill a bubble to check yourself C Correct answer Explanation Dave Grohl is a musician (Nirvana, Foo Fighters) while the others are computer science pioneers: Alan Cooper designed Visual Basic, John Backus created Fortran, and Grace Hopper worked on compilers. This makes option C the odd one out.