Option B - pneumonia
Pneumonia is the most common complication of influenza. This complication is usually caused by bacterial superinfection, most commonly by Staphylococcus aureus, Streptococcus pneumoniae and Hemophilus influenzae.
Septicemia, meningitis and pulmonary edema are not complications of influenza.
Pneumonia-pneumonia is the most common complication of influenza. it may be either primary influenza viral pneumonia or pneumonia secondary to a bacterial infection. other complications of influenza include myositis, exacerbation of chronic obstructive pulmonary disease, and reyes syndrome. myocarditis, pericarditis, transverse myelitis, and encephalitis are rare complications of influenza. although septicemia may arise when any infection becomes overwhelming, it rarely results from influenza. meningitis and pulmonary edema arent associated with influenza.