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': 'A boy with multiple bullous lesions over trunk and periostitis on x-rays. What should be the next investigation \nSelect and explain. \nA. VDRL of mother & child, B. PCR for maternal TB, C. HBsAg screening, D. ELISA of mother and Child', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. VDRL of mother & child Vescobullous lesion with periostitisQ indicate congenital syphilis; so VDRL shoud be done.', 'role': 'assistant'}]