MCQ
Which of the following order is correct


- A$a, b, c$
- B$b, c$
- C$b, c, d$
- ✓$a, b, c, d$


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$HA \to A^-+ H^+$ , $\Delta H = Z$
$H^+ + OH^-\to H_2O$, $\Delta H = X$
$HA + OH^-\to A^-+ H_2O$, $\Delta H = Y$