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: Skin
[{'content': 'The Drug of choice for a pregnant woman in 2nd trimester with pustular psoriasis is: \nSelect and explain. \nA. Prednisolone, B. Dapsone, C. Acitretin, D. Methotrexate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Systemic coicosteroids are not teratogenic and they are the recommended treatment of choice for pustular psoriasis in a pregnant woman. Ref: Obstetric Dermatology: A Practical Guide By Arieh Ingber, Chapter 13, Page 135', 'role': 'assistant'}]