What can I do when neet exam not pualify able to admission in government collage. For MBBS then what can I choose to my carrier for best

Hey Prashant !
MBBS isn't the sole career option which ensures success. There aee many fields in which one can excel their will is strong.
If you did qualify the JEE MAIN, and get into engineering, you would have great opportunities in the future. Either if you opt for General Studies and go for a B.Sc. in a particular subject, later you can crack UPSC and actually be a successful person.
So, you see the options are many, you just need to emphasize on your goal.
On the other hand, if MBBS is your sole priority, you can drop for a year and prepare hard in order to crack the exam next year.

Hope this helps.

All the Best !