Type 1b is Fulminant Type 1 Diabetes, characterized by no autoantibodies.

• A. True
• B. False
• C. It has autoantibodies
• D. It is Type 2 DM

Answer: (A)

The key idea is autoantibody status in type 1 diabetes subtypes. Type 1b (idiopathic type 1) is defined by the absence of islet autoantibodies, so describing it as having no autoantibodies aligns with that definition. Fulminant type 1 is a rapidly onset variant that also tends to lack autoantibodies, leading to sudden, severe hyperglycemia and often ketoacidosis. So the statement is true in highlighting the autoimmune-marker absence, though not every Type 1b case is fulminant. It is not Type 2 diabetes, which has a different pathophysiology.