Which of the following is a common symptom of upper respiratory tract infections?

• A. Chest pain
• B. Persistent sore throat
• C. Palpitations
• D. Swelling of the extremities

Answer: (B)

Upper respiratory tract infections most commonly affect the throat and surrounding structures, so soreness or irritation in that area is a classic and frequent symptom. A persistent sore throat reflects ongoing inflammation of the pharynx or tonsils, which happens in many viral colds and acute pharyngitis. The other options point to problems outside the upper airway—chest pain can indicate heart or lung issues, palpitations relate to heart rhythm or anxiety, and swelling of the extremities suggests fluid or systemic problems. Because sore throat directly matches the typical location and nature of URI inflammation, it is the best fit for a common URI symptom.