This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Medicine
Pseudo-hemoptysis is seen mostly with ? 
Select and explain. 
A. Streptococcus, B. E. coli, C. Serratia Marcescens, D. R.S.V
C: Serratia Marcescens
Answer: C: Serratia Marcescens 
Explanation: Ans. is 'c' i.e., Serratia Marcesens o Pseudo-hemoptysis is expectoration of blood other than respiratory tract i.e. GIT or blood draining from larynx.Cuases of PseudohemoptvsisCauseHistoryPhysical ExaminationLaboratory testsUpperrespiratorytractLittle or no cough; epistaxis, bleeding from gums when brushing teethGingivitis, telangiectasias, ulcerations, lacerations, or varices of the tongue, ose, or naso-, oro-, or hypopharynxObserving actively bleeding lesionUppergastrointestinaltractCoffee-ground appearance of blood due to mixture with HC1; usually lacks the bubbly, frothy appearance of bloody sputum; nausea, vomiting, or history of gastrointestinal diseaseEpigastric tenderness; signs of chronic liver diseaseAcid pH of blood; blood in nasogastric aspirate; barium swallow, esophagoscopy, and gastroscopySerratiamarcescensPrevious hospitalization broad-spectrum antibiotics mechanical ventilationNormalNo red blood cells in red sputum; culture of organismMalingeringPsychiatric illness; unconfirmed history of massive hemoptysis at midnightNormal unless self-induced lesions seen; patients unable to cough up blood on command (patients with true hemoptysis will)True hemoptysis usually must be ruled out