Hello Alok Singh,

Having gone through your query, there is no disadvantage on putting any college on your first list. Suppose you put a college X as your first preference, but you want only specific branch in that college so put only those branches as your preference in College X, if a branch doesn't matter put all branches of X in the first preference list. What happens in counselling is according to the rank obtained in exam and number of seats available, colleges/branch available is allotted to you. So think you got 173 ranks, And you put College X as your first preference, if 173 seats are available at that college you will get that college else you will get the college which is second in your preference list.

For any other queries, feel free to comment below. Have a great day!!