Which of the following statements are correct?
(A) The M3+∕M2+ reduction potential for iron is greater than manganese
(B) The higher oxidation states of first row d-block elements get stabilized by oxide ion.
(C) Aqueous solution of Cr2+ can liberate hydrogen from dilute acid.
(D) Magnetic moment of V2+ is observed between 4.4-5.2 BM.
Choose the correct answer from the options given below: