Continuous musical sounds heard on expiration are called:

Correct option is B

Wheezes are high-pitched, continuous musical sounds typically heard during expiration, caused by narrowed or obstructed airways. They are commonly associated with conditions like asthma, chronic bronchitis, and other obstructive lung diseases. These sounds are produced when air flows through tightened airways, and their presence can help in diagnosing respiratory distress or airflow limitation.
Explanation of options: (a) Crackles – Crackles are discontinuous, non-musical, popping sounds heard mostly on inspiration. They are linked to fluid in the airways, such as in pneumonia, pulmonary edema, or interstitial fibrosis, not typically expiration-related or musical. (b) Wheezes – This is the correct answer. Wheezes are continuous and musical in nature, most commonly heard during expiration. They indicate narrowing or obstruction in the lower respiratory tract, often in asthma or COPD patients. (c) Bronchial sounds – These are normal breath sounds heard over the trachea. They are loud and high-pitched but not musical or continuous, and not indicative of airway obstruction. (d) Pleural friction rub – This is a coarse, grating sound heard during both inspiration and expiration. It results from inflamed pleural surfaces rubbing together and is not musical in character.