Wheezing.

• A. Bradypnea
• B. Apnea
• C. Wheezing
• D. Nasal Flaring

Answer: (C)

Wheezing is a high-pitched whistling sound heard during breathing that comes from turbulent airflow through narrowed or obstructed airways. This makes it the best fit for the symptom described, since it directly reflects airway constriction or secretions in the lower respiratory tract, as seen in conditions like asthma or bronchitis. The other terms describe different respiratory phenomena: bradypnea is simply a slowed breathing rate, apnea is a pause or stop in breathing, and nasal flaring is an increased effort to breathe through the nose often seen in distress but it’s not a sound produced by narrowed airways. So the presence of a wheeze specifically indicates airflow limitation rather than just slow breathing, a temporary stop, or a sign of effort.