MgCO3 is not precipitated with the carbonates of Vth group radicals in presence of NH4Cl and NH4OH because:
a. MgCO3 is soluble in NH4OH
b. MgCO3 is not precipitated in presence of NH4Cl
c. MgCO3 is soluble in water
d. MgCO3 is soluble in (NH4)2CO3