The intrinstic factor-X-activator complex is formed during blood coagulation. The zymogen factor X is converted to its active form factor Xa by intrinstic factor-X-activator complex. This complex consists of a protease factor IX which along with its cofactor, factor VIII assembles on a phospholipid surface. Factor VIII is also known as antihemophillic globulin or AHG. Calcium ions are also required during blood coagulation for the formation of this complex.
Hence, intrinstic factor-X-activator complex is IX + AHG + Phospholipid + Calcium ions.
So, the correct answer is D.
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