Which of the following is a commonly used tool for diagnosis of respiratory disease?

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Spirometry is a commonly used tool for diagnosis of respiratory disease. It measures lung function by assessing the amount and speed of air that can be inhaled and exhaled. It is used to diagnose conditions such as asthma, chronic obstructive pulmonary disease (COPD), and pulmonary fibrosis. A complete blood count and streptococcal antibody test are not specific to respiratory diseases, while a chest x-ray may provide some diagnostic information but is not as sensitive as spirometry in detecting respiratory conditions.

Which of the Following Is a Commonly Used Tool for Diagnosis