In the last five or six years, it has not been a regularity for Arsenal to have a selection dilemma in the two centre-back positions. Since the days of Per Mertesacker and Laurent Koscielny, centre-backs have drifted in and out of Arsenal line-ups with most failing to impress. However, since the arrival of Mikel Arteta, Arsenal's defense has been shored up for the most part. Partnerships are beginning to form and serious candidates for Arsenal's future starting centre-back options are making themselves known. The Arsenal Boss has the unenviable job of choosing a partnership to stick with as we approach the most critical part of the season, but who will he choose? Let's look at the options.Gabriel MagalhaesArsenal's £23 million pound signing has enjoyed a first season in England of mixed emotions. The Brazilian started his Arsenal career in style, scoring on his debut and despite Arsenal falling out of form, Gabriel was performing brilliantly individually. He even managed to win back-to-back-to-back Arsenal player of the month awards, highlighting the impression he had made. However as Arsenal's form finally seemed to be turning around, Gabriel's fell away. He caught Covid-19 and has struggled to get back to the heights he started at since.