Which of the following is primarily caused by the mumps virus?

• A. Painful swelling under the ears
• B. Fever and sore throat
• C. Severe skin rash
• D. Persistent cough

Answer: (A)

The correct answer is primarily characterized by painful swelling under the ears, which is a hallmark symptom of mumps. Mumps is a viral infection known for causing swelling of the parotid glands, leading to noticeable swelling and pain in the salivary glands located just below the ears, which can affect one or both sides of the face. This swelling can be quite severe and is often accompanied by discomfort and tenderness in the area.

While other symptoms, like fever and sore throat, can be associated with mumps, they are not as definitive as the swelling. Severe skin rash and persistent cough are not symptoms typically linked to mumps, making them less relevant to this particular illness. Thus, the most prominent and easily identifiable symptom of mumps is indeed the painful swelling under the ears.