On-Sets Quiz – November 2016 By Craig Zeller 9 December, 2016 Comments Off on On-Sets Quiz – November 2016 In general, which of these Set-Names are ambiguous? (A) B ∩ G − Y (B) B U G − Y (C) B − R ∩ G’ (D) B − R U G’ Answer See this and all of the other AGLOA On-Sets Quizzes here.