If equal volumes of \(\mathrm{AB}_2\) and XY (both are salts) aqueous solutions are mixed, which of the following combination will give a precipitate of \(\mathrm{AY}_2\) at 300 K ?
(Given \(\mathrm{K}_{\mathrm{sp}}\) (at 300 K) for \(\mathrm{AY}_2=5.2 \times 10^{-7}\))

1. A \(3.6 \times 10^{-3} \mathrm{M}~ \mathrm{AB}_2, 5.0 \times 10^{-4} \mathrm{M}~ \mathrm{XY}\)
2. B \(2.0 \times 10^{-4} \mathrm{M}~ \mathrm{AB}_2, 0.8 \times 10^{-3} \mathrm{M}~ \mathrm{XY}\)
3. C \(2.0 \times 10^{-2} \mathrm{M}~ \mathrm{AB}_2, 2.0 \times 10^{-2} \mathrm{M}~ \mathrm{XY}\)
4. D \(1.5 \times 10^{-4} \mathrm{M}~ \mathrm{AB}_2, 1.5 \times 10^{-3} \mathrm{M}~ \mathrm{XY}\)