Multiple Choice Question

For i $=2,3,4,$ let Ai $=\{$i$,$ i$+1,$ i$+2,...,$ i$2\}$

be the set of integers from i to i$2$

$.$ Select the element below that is a member of $\backslash$cup $4$i$=2$Ai

$.$

Multiple choice question.

$8$

$1$

$20$