The complex [Fe(H₂O)₅NO]₂+ is formed in the brown ring test for nitrates when freshly prepared FeSO4 solution is added to aqueous solution of NO3– followed by addition of conc.H₂SO₄ . Select correct statement about this complex
(A) Hybridisation of iron is d2sp3 .
(B) Iron & nitrosyl has +1 oxidation state
(C) It has magnetic moment of 3.87 B.M. confirming three unpaired electrons in Fe
(D) all the above are correct statements