Which of the following coagulation factors is synthesized by the liver and is essential for the activation of Factor X in the intrinsic pathway?

A Factor IX ✓
B Factor XI
C Factor VIII
D Factor VII is not part of intrinsic but Factor IX is correct answer as per question context.

Explanation

Factor IX, also known as Christmas factor, is a vitamin K-dependent clotting factor that plays a crucial role in the intrinsic pathway of coagulation. It is synthesized by the liver and is essential for the activation of Factor X.

Source

Robbins and Cotran Pathologic Basis of Disease
Hematology Hematology: Coagulation Disorders Hematology: Coagulation Disorders Hard MEDICAL Confidence: high