Which of the following statements are correct?
(A) The M$$^{3+}$$/M$$^{2+}$$ 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 Cr$$^{2+}$$ can liberate hydrogen from dilute acid
(D) Magnetic moment of V$$^{2+}$$ is observed between 4.4-5.2 BM
Choose the correct answer from the options given below:

Let us analyze each statement:

(A) M³⁺/M²⁺ reduction potential: Fe³⁺/Fe²⁺ = +0.77 V, Mn³⁺/Mn²⁺ = +1.51 V. Actually Mn³⁺/Mn²⁺ is higher. So this statement is incorrect.

(B) Higher oxidation states of first row d-block elements are stabilized by oxide ion (due to its small size and ability to form multiple bonds). This is correct. Example: CrO₄²⁻, MnO₄⁻.

(C) Cr²⁺ is a strong reducing agent (E° for Cr³⁺/Cr²⁺ = -0.41 V), so it can reduce H⁺ to H₂. Cr²⁺(aq) can liberate hydrogen from dilute acid. This is correct.

(D) V²⁺ has d³ configuration, so 3 unpaired electrons. $$\mu = \sqrt{3(3+2)} = \sqrt{15} = 3.87$$ BM. This is NOT between 4.4-5.2 BM. Incorrect.

Correct statements: B and C only.

The correct answer is Option 1: B, C only.