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: Medicine
Sushila, 25-year-old young lady presented with a complaint of acute hirsuitism and hoarseness of voice. Which of the following should be the best investigation to be done for the diagnosis - 
Select and explain. 
A. Blood pregnenolone levels, B. Blood DHEA levels, C. 17-ketosteroids level, D. LH and FSH levels
B: Blood DHEA levels
Answer: B: Blood DHEA levels 
Explanation: None