<prompt> Which of the following is the least common bacteria responsible for Acute Exacerbation of Chronic BronchitisStreptococcus pneumoniaeMoraxella catarrhalisHaemophilus influenzaStaphylocccus aureus  <response>: Ans. is d i.e., Staphylocccus aureus Most common bacterias associated with acute excerbation in COPD Hemophilus influenzae Moraxella catarrhalis Streptococcus pneumoniae 