<prompt> A boy with multiple bullous lesions over trunk and periostitis on x-rays. What should be the next investigationVDRL of mother childPCR for maternal TBHBsAg screeningELISA of mother and Child  <response>: A i.e. VDRL of mother child Vescobullous lesion with periostitisQ indicate congenital syphilis; so VDRL shoud be done. 