Addition of a solution of oxalate to an aqueous solution of mixture of `Ba^(2+), Sr^(2+)` and `Ca^(2+)` will precipitate

Options

A. `Ca^(2+)`
B. `Ca^(2+)` and `Sr^(2+)`
C. `Ba^(2+)` and `Sr^(3+)`
D. All the above

Explanation

Oxalates of `Ca^(2+),Sr^(2+)` and `Ba^(2+)` are all insoluble in neutral media.