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: Unknown
In describing the structure of steroid hormones, DHEA belong to which of the following group in the classification of steroid hormones 
Select and explain. 
A. C19, B. C21, C. C17, D. C18
A: C19
Answer: A: C19 
Explanation: None