What is correct about the cations of group V?

Options

A. These cations should be tested in the sequence Ba,Sr,Ca
B. These cations should be tested in the sequence Ca,Sr,Ba
C. These cations should be tested in the sequnce Sr,Ca,Ba
D. These cations can be detected in any sequence

Explanation

Cations for group V should only be tested in the sequence `Ba^(2+),Sr^(2+),Ca^(2+)`. This is because test for `Sr^(2+)`[white ppt. with `(NH_4)_(2)SO_(4)`] is also given by `Ba^( 2+)`. Similarly test for `Ca^(2+)` (white ppt. with amm. Oxalate) is also given by `Ba^(2+)` and `Sr^(2+)`.