<prompt> MC cause of common cold coryza is:Influenza virusRespiratory Synctial virusAdenovirusEnterovirus 70  <response>: COMMON COLD CORYZA Aetiology: Caused by a virus. The infection is usually contracted through airborne droplets. Several viruses adenovirus, picornavirus its subgroups such as rhinovirus, coxsackie virus enteric cytopathic human orphan virus are responsible. Incubation period is 1-4 days illness lasts for 2-3 weeks. 