Which of the following pair is precipitated with `(NH_4)_2CO_3` in the presence of basic medium ?

Options

A. `Cu^(2+), Pb^(2+)`
B. `Ni^(2+), Ca^(2+) `
C. `Ca^(2+), Ba^(2+) `
D. `Na^(+),K^(+)`.

Answer

C

Explanation

Both belong to Group V.l