Assume that A $=\{$a$,$ b$\}$ and B $=\{$c$,$ d$\},$ which of the following is A $\backslash$times B$?$

Question $5$ options:

$\{($a$,$ c$),($b$,$ d$)\}$

$\{($a$,$ c$),($a$,$ d$),($b$,$ c$),($b$,$ d$)\}$

$\{$a$,$ b$,$ c$,$ d$\}$

$\{($c$,$ a$),($d$,$ a$),($b$,$ c$),($b$,$ d$)\}$