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
Nail pitting is seen with ? 
Select and explain. 
A. Paronychia, B. Ectodermal dysplasia, C. Alopecia areate, D. All the above
D: All the above
Answer: D: All the above 
Explanation: Ans. is'd' i.e., All the above