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': 'The following drug can be given safely in pregnancy: \nSelect and explain. \nA. Propylthiouracil, B. Methotrexate, C. Warfarin, D. Tetracycline', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Warfarin: causes fetal warfarin syndrome which includes chondrodysplasia punctata,epiphyseal stippling,nasal hypoplasia,optic atrophy,microcephaly tetracycline:discoloration of deciduous teeth methotrexate:folate defeciency TEXTBOOK OF OBSTETRICS,SHEILA BALAKRISHNAN,Pg no:565,2nd edition', 'role': 'assistant'}]