Equal volumes of `1M HCI` and `1M H_(2)SO_(4)` are neutralised by `1M NaOH` solution and `x` and `y kJ//` equivalent of heat are liberated, respectively. Which of the following relations is correct?
A. not a buffer solution and with `pHlt7`
B. not a buffer solution with `pHgt7`
C. a buffer solution with `pHlt7`
D. a buffer solution with `pHgt7`