Metallurgy online 2018 mains:

9.3 In the leaching method, bauxite ore is digested with a concentrated solution of NaOH that produces 'X' .When CO₂ gas is passed through the aqueous solution of 'X' a hydrated compound 'Y' is precipitated. 'X' and "y' respectively are :

Option 

$$\begin{gathered} 1. Na \left[Al{\left(OH\right)}_4\right] and A{l}_2{\left(C{O}_3\right)}_3 x{H}_{2}O \\ 2. Al{\left(OH\right)}_3 and A{l}_2{O}_{3 }x H_{2}O \\ 3. NaAl{O}_2 and A{l}_2{\left(C{O}_3\right)}_3 x H_{2}O \\ 3. Na\left[Al{\left(OH\right)}_4\right] and A{l}_2{O}_3 x H_{2}O \end{gathered}$$