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 moths. 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 treatment Continue PB-MDT till erythema subsides Biopsy the lesion to document activity Continue Dapsone alone for another 6 months