NIT allahabad vlsi may be better option here then nit calicut vlsi then nit rourkela vlsi mainly because course of all nits are almost same so if you are from north india then its better you join mnnit only otherwise you may even move sothwards also moreover since you will be joining mtech so most mtech students also do a secondary coaching for exams like upsc and allahabad has been known for coachings and has a rich legacy of top performers being from allahabad's coaching's only.