name the metal of first row trasition series that has zero spin only magnetic moment in its +2 oxidation state

Q. A $3d$ series metal cation forms octahedral complexes with both ${}^{-}SCN$ as well ${}^{-}CN$ ions as ligands. The complex $\left[M\right(CN{)}_6{]}^{3-}$ has a spin only magnetic moment of $\sqrt{3}BM$ whereas the complex ${\left[M\right(SCN{)}_6]}^{3-}$ has a spin only magnetic moment of $\sqrt{35}BM$. Then out of the following, metal $M$ can be

Q. An element belonging to 3d series of modern periodic table has spin magnetic moment =5.92 B.M.in +3 oxidation state. Determine the atomic number of element.

Q. A $3d$ series metal cation forms octahedral complexes with both ${}^{-}SCN$ as well as ${}^{-}CN$ ions as ligands. The complex $\left[M\right(CN{)}_6{]}^{3-}$ has a spin only magnetic moment of $\sqrt{3}$ BM whereas the complex $\left[M\right(SCN{)}_6{]}^{3-}$ has a spin only magnetic moment of $\sqrt{35}$ BM. Then out of the following, metal $M$ can be:

Q. A complex of certain metal has the magnetic moment of $4.89BM$ whereas another complex of the same metal with same oxidation state has zero magnetic moment. The metal ion could be :

Q. A complex of a certain metal has the magnetic moment of 4.9 BM whereas another complex of the same metal with the same oxidation state has zero magnetic moment. The metal ion would be: