Criminology

Hi.
To become a CBI officer, you have to appear the exams conducted by UPSC. It is called the Combined Graduate Level Examination. This exam is held once a year for the post of Sub-Inspectors of Police in Central Bureau of Investigation. Yes, B.A. Criminology will be beneficial for you.
Thanks!

Course level-Graduate,
Duration of the course- Three years
Examination type-Annual
Eligibility-Pass in class 12th examination in Arts or Science stream
Admission process-Merit based
Course fee-INR 9,000 to 1,20,000
Average starting salary-INR 3 to 4 LPA
*Top recruiters-Government Agencies, CBI, FBI, IB,

Admission is through counselling based on the rank obtained in Guru Gobind Singh Indraprastha University Common Entrance Test (GGSIPU CET).
https://www.shiksha.com/humanities-social-sciences/course/m-a-in-criminology-lok-nayak-jayaprakash-narayan-national-institute-of-criminology-and-forensic-science

No such course is available. Refer the link to know more: https://www.shiksha.com/university/ggsipu-guru-gobind-singh-indraprastha-university-delhi-24725/courses/ba-bc

No, it's not possible for you get admission for criminology after completing 12th standard in commerce stream. You need to be from science background to be eligible for this course.

If you want to study crime then go for law after your 12th.

According to me, M.Sc in forensic Science has better scope, better salary and is more in demand. Very soon, the scope will go wider as the government has approved, to open some more forensic labs throughout India.

M.Sc. In criminology is not offered in IGNOU.

Madras University offers BA in Criminology and Police Administration through distance.

Nothing much has been stated by the University regarding the seats. So, I would request you to contact them and the relevant information: http://www.ipu.ac.in/Contact_Us.php.