A case presenting with a gray coloured pseudomembrane whose removal is difficult and painful, can be___________?

Correct answer: C. Diphtheritic lesion

A. ANUG
B. Secondary stage of syphilis
C. Diphtheritic lesion
D. Desquamative gingivitis

Explanation

Diphtheria produces a thick gray pseudomembrane that is firmly adherent, so attempted removal is painful and may cause bleeding. ANUG can also form a gray slough, but it primarily affects necrotic gingival papillae rather than producing a firmly attached pharyngeal-type membrane.

Submitted by a TestUstad contributor and published by the TestUstad editorial teamLast updated 18 September 2026

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A case presenting with a gray coloured pseudomembrane whose removal is difficult and painful, can be___________?

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