Answer the following question, with explanation first.
There are laws concerning safety, therefore a fire extinguisher must be kept in every what?\nOptions:\n- most businesses\n- house\n- public building\n- vehicle\n- chemistry lab

public building
Public building is open for all public so its not safe always.

As per laws for safety a fire extinguisher must be kept in every public building.

.

The final answer: public building