code class$=$"asciimath"$>8$:$01155$ End Semester $q,$ cet.iitp.ac$.$in End Semester Examination Back Time left $1$:$58$:$52$ Question $9$ Not yet answered Marked out of $2\mathrm{.}00$ Flag$\_$question Which data structure is often used to implement the queue? a$.$ Stack b$.$ Array c$.$ Binary tree d$.$ Linked list