Hi Alka! 

Greetings! 

I guess the first step is determining whether you want to pursue a career in criminology or in general business, then choose the subjects accordingly.

• Crime Scene Investigation
• Cyber Forensics
• Forensic Psychology
• Forensic Chemistry
• Forensic Biology
• Analytical Chemistry
• Instrumental Chemistry
• Toxicology
• Ballistics
• Questioned Documents
• Forensic Odontology

These are the major subjects in the forensic science.

Hope this helps you! 

All the best!