Which of the following describes a maximum-boiling azeotrope?

1. AA mixture showing negative deviation from Raoult's law, whose vapour has the same composition as the liquid and which boils at a higher temperature than either component
2. BA mixture showing positive deviation from Raoult's law that boils at a lower temperature than either component
3. CAn ideal mixture that can be fully separated by fractional distillation
4. DA mixture showing positive deviation whose boiling point is higher than that of either component