Hello,

Thank you for connecting to career360.com . As you mentioned in your question details IIT allahabad . so the following are the details for entering in the prestigious institutions like IIT :

clear JEE main then clear JEE advanced with a good rank so as to get a seat in an IIT . All the best for your future ..and other govt engineering colleges intake students through their respective  state CETs

See, there are plenty of Government colleges but admissions are through state entrance exams or through JEE Main. Also since there are so many, you will have to specify which state and what your qualifications are and if you have appeared for any entrance tests.