Answer:
The correct answer is - option A.
Explanation:
The common cold virus is a virus that includes various type of species and strains that attacks and sticks to the cells of the nasal cavity and back of the throat. These viruses include coxsackieviruses, rhinoviruses, adenoviruses, and coronaviruses.
From the throat, they quickly affect the upper respiratory tract. Medicines can help relieve the symptoms of the cold. However, there is no cure as they mutate their genome very quickly and the period it takes to develop producing vaccine it no longer uses as its genome changed.
