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
A 14 year old healthy girl of normal height and weight for age, complains that her right breast has developed twice the size of her left breast since the onset of pubey at the age of 12. Both breasts have a similar consistency on palpation with normal nipples areolae. The most likely cause for these findings is ? 
Select and explain. 
A. Cystosarcoma phyllodes, B. Virginal hyperophy, C. Fibrocystic disease, D. Early state of carcinoma
B: Virginal hyperophy
Answer: B: Virginal hyperophy 
Explanation: Ans. is 'b' i.e. Virginal hyperophy