ANSWER:
[tex]A\operatorname{\cap}B=\lbrace5\rbrace[/tex]
STEP-BY-STEP EXPLANATION:
We have the following sets:
[tex]\begin{gathered} A={}{}{}\lbrace5,10,15,20,25,30...\rbrace \\ \\ B=\lbrace1,3,5,7,9,11,13\rbrace \end{gathered}[/tex]
We must find the intersection of these groups, taking into account that the numbers in common between both sets, then we would have:
[tex]\begin{gathered} A\cap B=\lbrace5\rbrace \\ \end{gathered}[/tex]
So the correct answer is the first option
