The complex \(\left[\mathrm{Co}(\mathrm{ONO})\left(\mathrm{NH}_{3}\right)_{5}\right] \mathrm{SO}_{4}\) is named as
(a) nitropentamminecobalt (III) sulphate
(b) nitropentamminecobalt (II) sulphate
(c) nitritopentammine obalt (III) sulphate
(d) pentamminenitritocobalt (III) sulphate