This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Warfarin induced skin necrosis is seen in ? 
Select and explain. 
A. Protein C deficiency, B. Protein S deficiency, C. Hemophillia, D. Antithrombin III deficiency
A: Protein C deficiency
Answer: A: Protein C deficiency 
Explanation: Ans. is 'a' i.e., Protein C deficiency o Warfarin - induced skin necrosis occurs in patients with undiagnosed protein C deficiency.