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: Gynaecology & Obstetrics
Causes of vulval pain are due to all except: 
Select and explain. 
A. Neuralgia of the genitofernoral nerve, B. Herpes, C. Vulval vestibulitis syndrome, D. Lichen sclerosus
D: Lichen sclerosus
Answer: D: Lichen sclerosus 
Explanation: Vulval pain syndrome
Vulvar pain sensation may be burning, stinging or irritation. It may be due to several reasons:

Aphthous ulcer
Vulval dermatoses
Herpes genitalis
Pudendal or genitofemoral nerve neuralgia
Vulvodynia (burning vulva syndrome)
Vulval vestibulitis syndrome
Referred pain from urethral or vagina
Psychological