In case of road accidents, your first step for the injured person should be to treat asphyxia. Asphyxia refers to the condition where there is a lack of oxygen supply to the body. It can occur due to various reasons, such as airway obstruction or inability to breathe properly.

Treating asphyxia is crucial because without an adequate supply of oxygen, the person`s vital organs, including the brain and heart, can be severely affected. In severe cases, it can even lead to cardiac arrest.

Option 2, treating cardiac arrest, is not the correct first step because cardiac arrest usually occurs as a result of asphyxia or other severe injuries. Therefore, it is important to address the underlying cause before focusing on treating a cardiac arrest.

Option 3, arresting hemorrhage, is also not the immediate first step as stopping bleeding is important but treating asphyxia takes precedence in order to prevent further damage.

Option 4, treating for shock, is not the immediate first step either. While shock can occur as a result of severe injuries, it is important to prioritize addressing asphyxia before focusing on treating shock.

Alert - The correct answer should be Option 3, arresting hemorrhage. In case of road accidents, one of the first steps for the