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: Gynaecology & Obstetrics
Precocious puberty is defined as all of following except 
Select and explain. 
A. Onset of menstruation before age of 10 years., B. Appearance of breast budding before age of 8 years in females., C. Menstruation before age of 8 years., D. Puberty occuring before 9 years in male.
C: Menstruation before age of 8 years.
Answer: C: Menstruation before age of 8 years. 
Explanation: Precocious puberty is menstruation before age of 10 years.