$12.$ Jack is a new trainee at LM&J who has been sent to a client location to patch up cables connecting the switch to the data center. While doing so$,$ Jack is unable to decide which connector to consider while connecting the ferrules of an SMF $($Single Mode Fiber$)$ cable that measures $1\mathrm{.}25$ mm$.$ Which one of the following connectors should Josh opt for under the circumstances so that there are minimum back reflections?