NEET 2025 Chemistry question on Equilibrium

Phosphoric acid ionizes in three steps with their ionization constant values $K_{a1}$, $K_{a2}$ and $K_{a3}$, respectively, while $K$ is the overall ionization constant. Which of the following statements are true?

A. $\log K = \log K_{a1} + \log K_{a2} + \log K_{a3}$

B. $\text{H}_3\text{PO}_4$ is a stronger acid than $\text{H}_2\text{PO}_4^-$ and $\text{HPO}_4^{2-}$

C. $K_{a1} > K_{a2} > K_{a3}$

D. $K_{a1} = \dfrac{K_{a3} + K_{a2}}{2}$

Choose the correct answer from the options given below :