Hello Aspirant,
I think you should not resign from your post if you want to give PO exam. You can attempt any exam while doing this job.
It will not be a reasonable decision.
If you get selected for PO then you can resign from your existing post and join the job of your choice.
If you want to quit your service to completely concentrate on other exams and organize accordingly then you can go for it. It all depends on you.
I hope it helps.
Thank you.
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