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: Dental
"Keratotic sandal" is  seen in which of the following? 
Select and explain. 
A. Reiter's disease, B. Pityriasis rubra pilaris, C. Tinea versicolor, D. Sezary syndrome
B: Pityriasis rubra pilaris
Answer: B: Pityriasis rubra pilaris 
Explanation: Pityriasis rubra pilaris present with red hyperkeratotoc follicular papules and thickening of palms & soles.
Often the thickening on sole is so thick that it appears like a sandal - termed as "Keratotic sandal"