A mixture of magnesium chloride and magnesium sulphate is known to contain 0.6 moles of chloride ion and 0.2 moles of sulphate ions. For quantitative estimation of Mg, above mixture is treated with set of reagents to form `Mg_(2)P_(2)O_(7)` produced is:
A. 0.5
B. 0.25
C. 0.8
D. 0.7