A 30 years old male patient presents with weakness of right upper and both lower limbs since 4 months. He developed digital infarcts involving 2nd and 3rd fingers on right side and 5th finger on left side. On examination, BP was 160/140 mm Hg, all peripheral pulses were palpable and there was asymmetrical neuropathy. Investigations showed a Hb 12 gm, TLC - 12000 Cu mm. Platelets 4,30.000. ESR - 49 mm. Urine examination showed proteinuria and RBC -10-15/hpf with no casts. Which of the following is the most likely diagnosis?