Answer:
The correct answer would be B. common cold.
Common cold refers to the viral infection of the upper respiratory tract.
Numerous virus can cause common cold such as rhinovirus (the most common cause), human coronavirus, influenza viruses, adenoviruses, human respiratory syncytial virus et cetera.
The sign and symptoms may include running nose, coughing, sore throat, headache, sneezing, and fever.
The treatment may include the use of antibiotics and antivirals and therapies like hydration, gargling, and rest, which help in relieving the symptoms.
