<prompt>  A patient with leprosy had slightly erythematous, anesthetic plaques on the trunk and upper limbs. He was treated with paucibacillary multidrug therapy PB -MDT for 6 months. At the end of 6 months, he had persistent erythema and induration in the plaque. The next step of action recommended by the World Health Organization WHO in such a patient is -Stop antileprosy treatmentContinue PB-MDT till erythema subsidesBiopsy the lesion to document acitivityContinue dapsoen alone for another 6 months 