A 20 year old woman presents with hemoptysis, bilateral conductive deafness and palpable purpura on the legs. X ray chest shows a thin walled cavity in left lower zone. Investigations shows a leukocyte count of 12000/mm3, red cell casts in the urine and serum creatinine 3mg/dL. What is the most probable diagnosis?
Henoch-Schonlein purpura Polyaeritis nodosa Wegener's granulomatosis Disseminated tuberculosis