Kerala

There are many good colleges for B.Sc. In Operation Theatre (OT) across India. Here are some of the top colleges for B.Sc. In OT:
All India Institute of Medical Sciences AIIMS Delhi
Christian Medical College (CMC), Vellore
Kasturba Medical College, Manipal
Armed Forces Medical College (AFMC), Pune
Sri Ramachandra Institute of Higher Education and
Research, Chennai
JIPMER College, Puducherry.

If you want to prepare for Ph.D. then distance learning might be the best option for you as it will give you enough time to prepare without worrying about college attendance etc. There are many colleges in Kerala offering M.A. Through distance education:
1. Mahatma Gandhi University, Kerala
2. University of Calicut, Kerala
3. University of Kerala, Kerala.

Some colleges are:
-B.A. Political Science at School of Distance Education:
-University of Calicut, Malappuram
-EMEA College of Arts and Science, Malappuram.

To take admission at Amrita Vishwa Vidyapeetham for B.Sc. In Operation Theatre Technology you first have to clear the Amrita Entrance Examination. Selection for the candidates will be based on the rank obtained in the Amrita Entrance Examination. Allotment of seats for the shortlisted candidate will be based on the performance in the counseling/interview. Out of the total seats for all specialities, 50% seats will be alloted to the merit category and 50% to the management category including NRI I. e. 15% of seats.

Yes you can explore about part time Ph.D. regulation in India. Universities like LPU, IGNOU Anamali offer Ph.D. with various option of attendance for working people. Specially LPU gives various type of Ph.D. attendance options.
Working people can opt for part time ph d fron institutions like IIFT, IIT , IGNOU, LPU .LPU give many types of option to attend classes for Ph.d.

To get into a college in Kerala you have to write the KEAM examination that is held every year.

Yes it is possible.

The main colleges that offer criminology are:
University of Kerala, Thiruvananthapuram
Sree Sankaracharya University of Sanskrit, Kalady
Kannur University, Kannur
Mahatma Gandhi University, Kottayam.

A few colleges for forensic Science near kottayam are:
Mahatma Gandhi University (government college), St. Berchmans College, Alphonsa College, Assumption College
Baselius College, Marian College,. .

A few colleges that offer B.Sc. In Astrophysics are :
University of Calicut, Malappuram
St. Thomas College, Thrissur
Sree Narayana College, Kollam
Sree Sankara College, Kalady
Nirmalagiri College, Kuthuparamba
St. Xavier's College for Women, Aluva
government. College, Chittur
St. Mary's College, Thrissur.