Bаsed оn AARC clinicаl prаctice guidelines, which оf the fоllowing are the indications for bronchoscopy procedure?I. Need to obtain a cytological sample for evaluation of the lower respiratory tractII. To rule out the possibility of mucus plugging as the etiology of lobar pneumoniasIII. To differentiate the disturbance causing bowel obstructionIV. Management of secretions in ventilator associated pneumonias in the lower airways that inline suction catheters can’t get to.