JEE Main Chemistry question

25.3 g of sodium carbonate, NaCO, was dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates completely, the molar concentrations of Na and carbonate ions are, respectively (mol. mass of NaCO g mol):

• (A)0.9555 M and 1.910 M
• (B)1.910 M and 0.955 MCorrect
• (C)1.90 M and 1.1910 M
• (D)0.477 M and 0.477 M