<prompt> Commonest cause of hirsutism in a teenage girl :Ovarian diseasePheochromocytomaObesityObesityAdrenogenital syndrome  <response>: Ans. is a i.e. Ovarian disease As explained earlier PCOD is the most common cause of hirsutism. PCOD most common affects teenage girls 15 - 25 years. Therefore, In teenage girls most common cause of hirsutism is PCOD. 