We can change our college choice for 2nd counselling of rajasthan mbbs which we take in first counselling
Yes you can change your college in 2nd counselling. There is no issue in that you can easily change it.
Hope this helps you thankyou.
Yes, You can fill the other colleges in the choice filling option of the second round registration. You can check the complete counselling procedure of Rajasthan with the given below link.
https://medicine.careers360.com/articles/rajasthan-mbbs-counselling
Good Luck!