B.Sc Psychology

No, their eligibility criteria are different. Though the subject is the same, the course streams are different. For the BA Psychology admission, you'll need to pass Class 12 from any stream, but for the BSc in Psychology, you'll need to pass Class 12 with the Science stream only. Their minimum eligible marks can also differ.

According to the previous year cutoffs, you will surely get admission.

Hindu College, Delhi University, does not offer a B.Sc. (Hons.) degree in Psychology; however, it offers a BA (Hons.) in Psychology at the undergraduate level as part of Delhi University's psychology programs.

You can get admission at university of calcutta for B.Sc through merit based.

If you want to get admission in a B.Sc Psychology course, you need to have passed 12th (any stream, though Science is preferred in some places). Most colleges take students either through merit (12th marks) or through an entrance exam like CUET-UG (if you're applying to central universities).