Detailed Solution:
The correct answer is “Nitrochloro chloroform”.
1) Trinitrotoluene (TNT): TNT is a well-known explosive compound.
2) Trinitroglycerine (Nitroglycerin): Nitroglycerin is another explosive compound used in various applications.
3) Cyclotrimethylene Trinitramine (RDX): RDX is a powerful high explosive used in military and civilian applications.
4) Nitrochloro chloroform: This compound, also known as chloropicrin (trichloronitromethane), is not typically considered an explosive