<qa>  What is the cause of diabetes?1 Diabetes symptomspolydipsiapolyphagia, polyuria, weight lossskin itchingblurred vision and other acute metabolic network disorder that caused by high blood sugarcombined with random blood sugar 11.1 OR, 2 fasting plasma glucose FPG 7.0 OR, 3 2 h blood sugar after oral glucose tolerance test OGTT 11.1; 