Which of the following sets contain only isoelectronic ions?

Options

A. `Zn^(2+), Ca^(2+), Ga^(3+), AI^(3+)`
B. `K^(+), Ca^(2+), Sc^(3+), CI^(-)`
C. `P^(3-), S^(2-),CI^(-),K^(+)`
D. `Ti^(4+),Ar,Cr^(3+),V^(5+)`

Answer

B, C