If my score in neet ug is 420-450 which all clgs will get for mbbs in maharashtra

Dear Vivek, you haven't mentioned your Category. Neberthless, in 2018, under State Quota, the cut offs for various Categories have been as follows:

70% Regional:               30% State

General Category:              400 HCOMN              488 HCOMN
OBC:                                      357 HOBC                  473


Having said that cut off changes every year and is dependant on various factors like no.of seats available, no.of candidates appearing for the exam, top NEET score and difficulty of the exam. So we would suggest you to wait until the official Answer key has been released to weigh in your options. Alternatively, you can also check our page for cut offs of your Category: https://medicine.careers360.com/articles/neet-cutoff-maharashtra

Hello
You didn't mention your category, so I am assuming you from general Category.
Below is list of government medical colleges that you can get in Maharashtra with marks required in neet last year under state quota ;:-
Shri Vasant Rao Naik Government Medical College, Yavatmal:- 400
Government Medical College, Akola:- 428
Shri Vasant Rao Naik Govt. Medical College, Yavatmal:- 400
So there's chance of getting above colleges for you to get a seat with your marks.
thankyou
Please feel free to ask your further queries if any.