Hi Harshvardhan
Have you tried the system Restore option form that screen, to see if you have a restore point?
If not:
Microsoft do not provide version 1909 directly, so the best option is to use another PC to create the version 1909 bootable USB and clean install Windows 10 from that . . .
Click this safe link to download the Windows 10 ISO, version 1909
https://tb.rg-adguard.net/public.php
Then use Rufus to create the bootable USB from that ISofile:
Then boot your PC form that and clean install version 1909, and as soon as that is installed, disable the Radeon GPU form inside Device Manager . . .
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