Hey Nishchal , 

IT - software

CSE - software + hardware + OS core.

So basically you can say that IT is a part of CSE. Both the branches are good in term of job opportunities. Both have very good scope. You can choose any branch according to your interest. If we compare both the branches then CSE has more scope than IT.

Career Scope

CSE: Job openings for Software professionals is much higher in the corporate sector than in public sector. Professionals can join as junior programmer, database administrator, junior network manager, Data Analyst, Software Developer, Software Engineer, and Client-Server Systems Manager etc in the initial stage. Students have job opportunities at organizations like IBM, Intel, HP, TCS, INFOSYS, WIPRO, TECHMAHINDRA,CTS and Dell in India and abroad.

IT: Career options after B.tech in IT are good. IT Specialists are required in almost all range of employment fields such as finance, arts, medicine, defense, and other areas. Many opportunities are available in various IT firms all over India. Some of the leading IT Companies are Infosys, TCS, Wipro, Accenture, HCL Infotech, IBM, etc. Some of the leading public sector firms are BSNL, ISRO, CDIT, CDAC, etc.