Which of the following sets contain only isoelectronic ions?

Options

A. `Zn^(2+), Ca^(2+), Ga^(3+), Al^(3+)`
B. `K^(+), Ca^(2+), Sc^(3+), Cl^(-)`
C. `P^(3-), S^(2-), Cl^(-), K^(+)`
D. Both (2) and (3)

Answer

D