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
When heparin is given in pregnancy, which of the following is to be added ? 
Select and explain. 
A. Iron folic acid, B. Copper, C. Calcium, D. Zinc
C: Calcium
Answer: C: Calcium 
Explanation: 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