Hey Abhay,
BCA stands for Bachelor of Computer Application which is a three year programme which is best suited for the candidates who want to have knowledge about IT Sector and also helps student who want to gain knowledge in Computer Applications.
Top BCA Colleges in Delhi and Noida are:-
1. Institute of Management Studies (IMS), Noida
2. Sharda University,  Greater Noida, Uttar pradesh
3. Jamai Hamdard University, Delhi
4. St. Andrews Institute of Technology and Management, gurgaon, Delhi NCR.
5. Amity University, Noida
6. Jagan Institute of Management Studies( JIMS), Delhi NCR.
7. United Group of Institution (UGI), Greater Noida.
8. CPJ Institute of Management and Technology( CPJIMT), Delhi NCR
9. Jims Engineering Managrment Technical Campus, Noida
10. Prince Institute of Innovative Technology (PIIT), Greater Noida.
Hope it helps :)