This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of menstruation, Subject name: Gynaecology & Obstetrics
[{'content': 'Anita 15-year-old, complains of heavy periods since 2 months. O/E: wt 40 kg and BP 120/80 mmHg. All of the following investigations are indicated, except : \nSelect and explain. \nA. TSH, B. Platelet count, C. Bleeding and clotting time, D. Estradiol levels', 'role': 'user'}, {'content': "Answer: D \nExplanation: Investigations in a case of pubey menorrhagia : 1.Blood profile--Hb%, bleeding and clotting time, coagulation factors; blood film. 2.X-ray chest for tuberculosis. 3.Thyroid function tests. 4.Pelvic ultrasound PCOD, early fibroid. 5.If medical treatment fails, D&C should be done to rule out endometrial tuberculosis by PCR test. Reference: Shaw's Textbook of Gynaecology 16th edition page no 340", 'role': 'assistant'}]