All of the following cause a grey-white membrane in the throat except -

Causes of the membrane in the throat (Differential diagnosis of the membrane over the tonsil) Pyogenic membranous tonsillitis Infectious mononucleosis Traumatic ulcers Vincent's angina Agranulocytosis Adenovirus pharyngitis Candidal infection of tonsil Leukemia Diphtheria Aphthous ulcers