Hey,
BCA or Bachelor of Computer Applications is a three year full time graduation course divided into 6 semesters. People who want to build their career in the field of computers and Information Technology can opt for this.
Every college and universities has its own criteria for Admission.You should specify the college you want to opt for. For example if you want to get enrolled with Delhi University so you have to fill the form for DU SOL.This University provides you the correspondence education, but it doesn't offer BCA as a course.

Hope it helps:)