Concept:
Organized crime refers to planned and systematic criminal activities conducted by groups for illegal profit and control.
Step 1: Analyze Organized Predatory Crime.
This involves organized groups committing violent crimes like extortion, kidnapping, and robbery. Hence, A is correct.
Step 2: Analyze Crime Syndicate.
Crime syndicates are structured criminal organizations engaged in illegal trade and racketeering. Hence, B is correct.
Step 3: Analyze Great Gaba Crime.
There is no recognized criminological category called “Great Gaba Crime.” Hence, C is incorrect.
Step 4: Analyze Sadistic Criminal Group.
This is not a recognized classification of organized crime in criminology. Hence, D is incorrect.
Step 5: Analyze Criminal Racket.
Criminal rackets are organized illegal business activities carried out for profit. Hence, E is correct.
Step 6: Final Conclusion.
The correct set is:
\[
A,\; B,\; E
\]
Therefore, the correct answer is Option (C).