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: Gynaecology & Obstetrics
[{'content': 'In pregnancy : \nSelect and explain. \nA. Plasma fibrinogen levels are increased, B. Fibrinogen levels are decreased, C. Thyroglobulins are decreased, D. IgD are markedly increased', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Plasma fibrinogen levels are increased', 'role': 'assistant'}]