Hi Keerthana,
I understand that you are facing a dilemma related to your GATE 2020 examination center. I presume that Hyderabad that being your first preference of examination center is at a convenient location for you to appear for the GATE 2020 examination and now talking about your 2nd and 3rd venue, firstly be informed that it is highly likely that you would be allotted your first center of preference as the examination center but still there is a slim chance of the occurrence of otherwise that is you might be allotted preference 2 or 3.
So to solve this dilemma, firstly check if there is any other examination venue near your place of stay which is at your convenience of commute and if there is any then only you should consider editing your choice and changing your 2nd or 3rd preference to that venue. If that isn't the case then you have to stick with your current preference methodology.
BEST WISHES!
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