To practice virtualization, you can use any laptop with 8 GB RAM and Intel Core i5 or Intel Core i7 processor.
Under 55K INR, you can easily get a laptop with Intel Core i7 processor.
The two available options for you can be:
> Lenovo B50-70
(with 8 GB RAM and i7 processor)
> HP Pavilion 15-P045TX
(with 4 GB RAM and i7 processor) - RAM can always be upgraded to 8 GB whenever needed.
Hope this helps. Good Luck!!