In order to take admission in MCA below are the top universities which you should consider

Banaras Hindu University, Department of Computer Science 

BIT Mesra, Dept of IT & MCA

IIT Roorkee, Department of Mathematics

Jawaharlal Nehru University, School of Computer and Systems Sciences  

MNNIT Allahabad, Computer Science & Engineering Department

NIT Kurukshetra 

University of Delhi, Computer Sc

VIT University, School of IT & Engg. 

To check the private colleges you can refer below link

List of MCA Private Colleges

Good Luck!!