Common cold differs from pneumonia in, that
A. Pneumonia is caused by a virus while the common cold is caused by the bacterium Haemophillu influenzae.
B. Pneumonia pathogen infects alveoli whereas the common cold affects nose and respiratory passage but not the lungs .
C. Pneumonia is a communicable disease whereas the common cold is a nutrional deficiency disease.
D. Pneumonia can be prevented by a live attenuate bacterial vaccine whereas the common cold has no effective vaccine.
