Assertion(A) : The value of enthalpy of neutralization of a weak acid by strong base is numerically less than `57.1 kJ`.
Reason(R ) : All `OH^(-)` ions of strong base are not completely neutralized by `H^(+)` ions obtained from acid.
A. Statement-1 is true, statement-2 is true, statement-2 is a correct explanation for statement-1
B. Statement-1 is true, statement-2 is true, statement-2 is not a correct explnation for statement-1
C. Statement-1 is true, statement-2 is false.
D. Statement-1 is false, statement-2 is true.