Which of the following symptoms is associated with inhaling fluoride?

Inhaling fluoride can cause various respiratory symptoms, one of which is a sharp biting pain in the nose. This is due to fluoride's irritating properties on mucous membranes when inhaled. The nasal passages are particularly sensitive to irritants, and when fluoride enters these areas, it can lead to discomfort and pain.

The other symptoms, while they may relate to exposure to various irritants, are not specifically associated with inhaling fluoride. Indigestion typically relates to gastrointestinal issues rather than respiratory exposure, coughing fits could occur with numerous irritants but do not specifically point to fluoride, and throat irritation is a broader term that can apply to many substances, not just fluoride. Therefore, sharp biting pain in the nose is distinctly linked to the inhalation of fluoride due to its local irritant effect on the nasal mucosa.