Hello Vijay,

As you are diploma holder, so you are not eligible for MNIT, Jaipur. You can take JEE Mains exam and qualify in that and take JEE Advanced and can study in IITs. Though you can write JEE Mains you cannot take admission into NITs. You can take Uttar Pradesh State Level Lateral Entry Entrance examination for admission into other Colleges in Uttar Pradesh through Lateral Entry mode into 2 nd year of B.Tech.

To get more information about it go through below mentioned link.

https://www.careers360.com/university/malaviya-national-institute-of-technology-jaipur/courses/be-btech-idpg

I hope this information was helpful to you.

Best of Luck!!