This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sexuality and intersexuality, Subject name: Gynaecology & Obstetrics
[{'content': 'A 9-year-old girl presents with menarche. History reveals thelarche at the age of 7 years and adrenarche at the age of 8 years- the M/C cause of this condition in girls is: \nSelect and explain. \nA. Idiopathic, B. Gonadal tumor, C. Mc cure albright syndrome, D. Hypothyroidism', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Precocious pubey It is the appearance of appropriate secondary sexual charecters before the age of 8 years and occurance of menstruation before the age of 10 years The most common cause is constitutional(idiopathic -75% cases) due to premature activation of HPO Axis. SHAW&;S TEXTBOOK OF GYNAECOOGY,Pg no:56,15th edition', 'role': 'assistant'}]