Diabetes and angina both point to atherosclerosis. In patients undergoing angiography, catheterization can lead to embolism of a vulnerable atherosclerotic plaque in descending aoa downstream to renal aeries leading to an atheroembolic kidney disease. The symptoms of diabetic patient developed after angiography and since atherosclerotic lesion can involve the aoa, the atheroembolic event would explain the events. Presence of eosinophilia and mottling of toes and reduced kidney function confirm the diagnosis as Atheroembolic kidney disease. Hence Choice D is the answer. Lab findings include Rising serum creatinine Transient eosinophilia Elevated sedimentation rate Hypocomplementemia Definitive diagnosis by doing kidney biopsy:- Microvessel obstruction with cholesterol crystals that leave a cleft in the vessel. Contrast-induced nephropathy can occur in diabetics with chronic kidney disease. However rash, toe discoloration with the sudden rise of creatinine and eosinophilia are not seen in contrast-induced nephropathy. Hence choice B is ruled out Choice A is ruled out as it prevents contrast-induced nephropathy Choice C is ruled as out as heparin will not manage cholesterol embolism