This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Gaseous necrosis is seen in - 
Select and explain. 
A. CMV infection, B. Staphylococcal infection, C. Treponemal infection, D. HSV infection
C: Treponemal infection
Answer: C: Treponemal infection 
Explanation: Ans. is 'c' i.e., Treponemal infection Caseous necrosis is a feature of syphilis which is caused by tremonemal infection.Gaseous necrosisIt is a variant of coagulative necrosis. It is most commonly encountered when cell death is attributable to eain organismse.g., mycobacterium tuberculosis (TB), syphilis and fungi (Histoplasma, Coccidioidomycosis).