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': 'When heparin is given in pregnancy, which of the following is to be added ? \nSelect and explain. \nA. Iron folic acid, B. Copper, C. Calcium, D. Zinc', 'role': 'user'}, {'content': 'Answer: C \nExplanation: side effects of heparin haemorrhage heparin induced thrombocytopenia osteoporosis fat necrosis and hematomas elevated transaminases to counteract osteoporosis calcium is added TEXTBOOK OF OBSTETRICS,SHEILA BALAKRISHNAN,PG NO:577,2ND EDITION', 'role': 'assistant'}]