In fact, you can file for quash in HC and discharge in trial court, as long as there in no stay on the case from from HC. Having said that, if you are A1, until and unless there are absolutely no allegations against you in the in the case, quash is near impossible. I have seen plenty of A1's who failed to get their 498a quashed. After spending money and time, they did not get the relief.
Quash in high court is next to impossible. Discharge petition, depends upon the merits and demerits of the case, crpc 340 now it is not at all advisable now and will be dismissed. Try to get positive nod in discharge it self.