Dear student,

Sequence is totally up to and your interest, look all the 3 branches are too good and the branch of computer science engineering. As data structure and Block chain IoT is new and emerging and still prepare a space in the market but Information Technology is well established after computer science and engineering, there is nothing like a bad in all those two.

Still if you really need a preference then i will suggest you to go with the Information Technology  at first the Data structure at second the IoT. The best thing you can do is reorder your preference based up upon interest.

Best Of Luck!!!