11. Which of the following is true for [Ni(en)]+ (a) Paramagnetic, dsp, square planar, C. N. of Ni = 2 (b) Diamagnetic dsp, square planar, C. N. of Ni = 4 (c) Diamagnetic, sp, tetrahedral, C. N. of Ni = 4 (d) Paramagentic, sp, square planar, C. N. of Ni = 4