Chapter 2 - Set Theory - 2.4 Set Operations and Venn Diagrams with Three Sets - Exercise Set 2.4 - Page 94: 101

$IV$

"I Want to Hold Your Hand" was recorded by The Beatles, a group . It sold 12million copies and was released in 1963. Thus, this song belongs to the sets "Recorded before 1990" and "Recorded by a group" but not to "Sales exceeded 15 million." Thus, it must be written in Region $IV$.