This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Pubey, Subject name: Pediatrics
Most common cause of central precocious pubey in girls: 
Select and explain. 
A. Exogenous estrogen, B. Idiopathic, C. CNS tumor, D. Hypothyroidism
B: Idiopathic
Answer: B: Idiopathic 
Explanation: - MCC of central precocious pubey in girls is Idiopathic. - Organic causes are more common in boys. - OTHER CAUSES: Infections - TB, meningitis Injuries - Trauma, neurosurgery, Radiotherapy Tumors - Hypothalamic hamaoma (Gelastic seizures)- MCC of organic central precocious pubey CNS malformations like arachnoid cyst ,hydrocephalus, septo-optic dysplasia