With the NFPA diamond numbering system, the hazardous number code of 4 for fire hazard means:

A. extremely flammable.
B. non-combustible.
C. a low fire hazard.
D. highly reactive.



Answer :

Final answer:

The NFPA diamond number code 4 in the red diamond signifies a high fire hazard due to extreme flammability.


Explanation:

The NFPA diamond numbering system is used to identify hazards of chemicals. The number code 4 in the red diamond indicates a high fire hazard, meaning that the substance is highly flammable. This rating signifies that the chemical poses a significant risk of catching fire under normal conditions.


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