Those who got UPSC CMS kindly help. If we got selected in UPSC CMS

Those who got UPSC CMS kindly help. If we got selected in UPSC CMS and if we take DNB this time, can we join in the upsc post with DNB after completion. heard frm some one dat DNB people can’t work in upsc cms post. Is it true? Kindly guide

If we get job in cms n at the same time if we clear neetpg

Can we request n join 3years later?

After completion of pg if we join we will be considered as mo or specialist post will be given?

U have too choose one , after complete job of 2 year cms people give leave for pg