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
Which of the following is/are features of dishpan digit? 
Select and explain. 
A. Reddened finger, B. Exceptionally clean thumb, C. Fibrous rough callus, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Dishpan digit
Finger of the child who indulges in sucking habit. On examination, it will provide valuable information about the habits. They are:

Reddened.
Exceptionally clean thumb / nail / finger.
Fibrous rough callus.