Hello Aarti!
According to the UGC-NET (June 2020) guidelines, "A candidate is allowed to submit only one Application Form. If a candidate submits more than one Application Form, the candidature is likely to be cancelled."
So, you are advised to appear in the subject of your Post Graduation or its related/allied subject only.
Kindly visit the website : http://ugcnet.nta.nic.in and go carefully through the revelant details and instructions before filling up the form.
You may know that the last date to apply for UGC-NET June session has been extended. It is 16th May, 2020 (upto 4:30pm).

Hope this answer will help.

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