Which is true for ${\left[\mathrm{Ni}(\mathrm{en}{)}_2\right]}^{2+}$ ?

Diamagnetic, sp³, tetrahedral, C.N. of Ni = 4

Paramagnetic, dsp², square planar, C.N. of Ni = 2

Paramagnetic, sp³, square planar, C.N. of Ni = 4

Diamagnetic, dsp², square planar, C.N.of Ni = 4