Some of the colleges you can prefer for BCA in Kerela are:

ST JOSEPH'S COLLEGE DEVAGIRI, CALICUT

MGU, KOTTAYAM KOTTAYAM

ST. MARY'S COLLEGE, SULTHAN BATHERI

Some of the colleges you can prefer for BCA in Banaglore are:

KRISTU JAYANTI COLLEGE, BANGALORE

ACHARYA BANGALORE B-SCHOOL

PRESIDENCY COLLEGE, BANGALORE

Some of the colleges you can prefer for BCA in Chennai are:

Bharath University

Hindustan College of Arts and Science - Chennai

Jayagovind Harigopal Agarwal Agarsen College

You can refer to their official site for more details.

Good Luck.