Consider strings built out of the basic symbols a$,$ b$.$ Which of the following regular expressions captures all strings that contains at least two as but no consecutive as

Question $2$ options:

$($a$|$b$)*$

b$*($abb$*$a$)*$b$*$

b$*($ab$*$a$)*$b$*$

$($a$+$b$)*($ab$*$a$)*$b$*$a$*$