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
The Drug of choice for a pregnant woman in 2nd trimester with pustular psoriasis is: 
Select and explain. 
A. Prednisolone, B. Dapsone, C. Acitretin, D. Methotrexate
A: Prednisolone
Answer: A: Prednisolone 
Explanation: 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