Chemistry · PYQ NEET UG 2020

HCl was passed through a solution of \( \mathrm{CaCl_2} \), \( \mathrm{MgCl_2} \) and \( \mathrm{NaCl} \). Which of the following compound(s) crystallise(s)?

1. A
   Only NaCl
2. B
   Only \( \mathrm{MgCl_2} \)
3. C
   \( \mathrm{NaCl, MgCl_2}\text{ and }\mathrm{CaCl_2} \)
4. D
   Both \( \mathrm{MgCl_2}\text{ and }\mathrm{CaCl_2} \)