Single Sex Vs Co-Ed Schools, Which is Better?

Single-sex education was the norm in years gone by. Its proponents argue that boys and girls don't just learn differently but could also be a distraction to each other. But is that really the case? Its detractors say such an arrangement may lead to issues like hampering the overall development of the child amongst various other issues. However, both agree that the goal is to offer the best learning environment to children. Which side of the debate are you on?