In case of choking, what is the first step for a conscious adult?

The appropriate initial response for a conscious adult who is choking is to ask them to cough forcefully. This option is correct because coughing can often help to expel the object causing the obstruction from the airway. It utilizes the body's natural instincts to clear the throat and is a non-invasive first step. When an individual is choking but still conscious and able to cough, this indicates that their airway is not completely blocked, and promoting a strong cough can be an effective way to dislodge the object.

The other methods, such as performing the Heimlich maneuver or applying abdominal thrusts, are more aggressive techniques and should be employed if the person cannot cough or speak, suggesting a more severe blockage. Administering back blows could also be appropriate in specific cases if coughing does not work, but it is not the first step. Thus, encouraging forceful coughing is the safest and most effective initial action in this situation.