The correct options are
A Cough
B Diarrhoea
C Headache
H5N1 is a type of influenza virus that causes a highly infectious, severe respiratory disease in birds called avian influenza. The symptoms of H5N1 infection may include fever (often high fever, more than 38°C) and cough, sore throat, and muscle aches. Other early symptoms may include abdominal pain, chest pain and diarrhoea.