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: Pharmacology
Which of the following is a topical vit. D analogue? 
Select and explain. 
A. Cholecalciferol, B. Doxercalciferol, C. Calcipotriol, D. Paricalcitol
C: Calcipotriol
Answer: C: Calcipotriol 
Explanation: Ans. is 'c' i.e., Calcipotriol o Topical calcipotriol (Calcipotriene) is a Vitamin D analogue used in psoriasis.