A 35yrs male presents with numbness of both lower limbs and right upper limb.Examination reveals pulse 90/minute and BP 164/110 mm of Hg.He also has digital gangrene involving right 2nd and 3rd finger, urine routine examination is unremarkable.Microscope examination shows RBC's Hemogram and serum biochemistry is within normal limits. The most possible diagnosis is

• A. Polyarteritis nodosa
• B. Systemic lupus erythematosus
• C. Chrug-Strauss syndrome
• D. Malignant hypertension