What is the difference between a type I and type II von Willebrand disease in terms of von Willebrand factor (VWF) levels and function?

A Type I has decreased VWF levels and function, while type II has normal VWF levels but decreased function ✓
B Type I has normal VWF levels and function, while type II has decreased VWF levels and function
C Type I has decreased VWF levels but normal function, while type II has normal VWF levels but decreased function
D Type I has decreased VWF levels and function, while type II has increased VWF levels and function

Explanation

Type I von Willebrand disease is characterized by decreased levels of VWF, while type II is characterized by normal or elevated levels of VWF but with decreased function due to qualitative defects.

Source

Williams Hematology
Hematology Hematology: Coagulation Disorders Hematology: Coagulation Disorders Hard MEDICAL Confidence: high