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 dblock 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: