CT brain in a pt with multiple ring enhancing les - rftrft609

[ArchivalUser]

lesions .. now if this was the CT & the pt has focal sings & fever & we accordingly treated him /her with sulfadiazin Pyrimethamine & still no response the lesion persisted ..

what is the next best step ?
a.brain biopsy
b.brain irradiation
c.start albendazole
d.do brain MRI