This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical, surgical and gynaecological illness complicating pregnancy, Subject name: Gynaecology & Obstetrics
[{'content': 'Raised MCV in pregnancy can be due to all except \nSelect and explain. \nA. Megaloblastic Anaemia, B. Alcohol use, C. Hypothyroidism, D. Iron Deficiency', 'role': 'user'}, {'content': 'Answer: D \nExplanation: MCV > 100fl is macrocytic First sign of megaloblastic anemia in pregnancy is usually an elevated red cell MCV Causes Megaloblastic: Folate deficiency, Vitamin B 12 deficiency and Orotic aciduria Non-Megaloblastic: Liver disease, Alcoholism, Reticulocytosis, Hypothyroidism Drugs: Azathioprine, 5-Flourouracil, Zidovudine, Hydroxyurea Reference: High risk pregnancy; Fernando Arias; 4th edition; Page no: 236, 237', 'role': 'assistant'}]