system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Bleeding disorders with ↑ APTT and ↑PT:a) Factor 13 deficiencyb) Severe liver diseasec) Immune thrombocytopenic purpurad) Leiden (Factor V) deficiency
assistant
The correct answer is  Prothrombin time assesses factor V, VII, X & II ; all of which are synthesized in liver.
PTT assess measures activity of factor V, VIII, IX, X, XI, XII & II some of which (II, VIII, VII, X, V) are synthesized in liver.
So, in liver diseases both aPTT as well as PT are increased.