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
Oral examination is done in case of: 
Select and explain. 
A. Peutz jegher syndrome, B. Psoriasis, C. Beri-beri, D. Plummer vinson syndrome
A: Peutz jegher syndrome
Answer: A: Peutz jegher syndrome 
Explanation: A i.e. Peutz jegher syndrome Mucosal involvement is seen in: (requiring oral examination) Lichen planusQ, Leprosy Pemphigus vulgaris (not pemphigoid)Q Peutz Jegher Syndromes Erythema multiformae Syphilis (congenital & secondary) Measles (Koplik Spot)Q Fordyce's spot & disease Peutz jegher syndrome consists of: Melanosis (Brown macules) on oral mucosa, perioral region, lips & fingersQ Familial hamaomatous polyposisQ affecting the jejunum which leads to haemorrhage & intussusception.