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: Surgery
All are true regarding gynaecomastia, EXCEPT -a) May be seen in Addison' s diseaseb) Usually unilateral in young malesc) Acini are not involvedd) Bilaterality is due to endocrinopathy 
Select and explain. 
A. ac, B. ab, C. ad, D. bc
B: ab
Answer: B: ab 
Explanation: None