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: Skin
A 30 year old male presents with a creamy white patch on the tongue. The most probable diagnosis is: 
Select and explain. 
A. Candidiasis, B. Histoplasmosis, C. Lichen Planus, D. Aspergillosis
A: Candidiasis
Answer: A: Candidiasis 
Explanation: Candidal stomatitis or oral thrush is the presence of a curdy white pseudomembrane on the buccal, labial, tongue, gingival or palatal mucosa in otherwise healthy individuals. Ref: Skin Diseases and Sexually Transmitted Infection, Uday Khopkar, 6th Eidition, Page 61; Harrison's Principles of Internal Medicine, 16th Edition, Page 183, 188.