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: Pathology
[{'content': 'A 60 yr old female with h/o 8 blood transfusions in 2 years. Her Hb-60g/L, TLC- 5800, platelet- 3.4 lakhs, MCV 60, RBC-2.1 lakhs/mm3. He is having hypochromic microcytic anemia. Which investigation is not needed? \nSelect and explain. \nA. Evaluation for pulmonary hemosiderosis, B. Urinary hemosiderin, C. Bone marrow examination, D. G I endoscopy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: . Urinary hemosiderin', 'role': 'assistant'}]