NEET 2020 Chemistry question

HCl was passed through a solution of CaCl2, MgCl2 and NaCl. Which of the following compound(s) crystallise(s) ?

• (A)Both MgCl2 and CaCl2
• (B)Only NaClCorrect
• (C)Only MgCl2
• (D)NaCl, MgCl2 and CaCl2