Yes, you can get admission in BCA or BA at Yashwantrao Chavan Maharashtra Open University (YCMOU) after completing your Diploma in Mechanical Engineering.

YCMOU offers BCA and BA programs, and their minimum eligibility criteria typically require a pass in Class 12 or an equivalent examination with a minimum percentage (usually around 40-50%). Since you have a Diploma, which is considered equivalent to Class 12+ for some purposes, you meet the basic eligibility.

YCMOU doesn't have any restrictions on the stream you completed your Diploma in when applying for BCA or BA programs.

Overall, with your Diploma in Mechanical Engineering, you can pursue a BCA or BA program at YCMOU, opening doors to new career paths in computer applications or various arts disciplines.

https://www.careers360.com/university/yashwantrao-chavan-maharashtra-open-university-nashik

I hope it helps!