The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A boy complains of bleeding gums, swollen, Joints with hemorrhage into joints. His paternal and maternal uncle complains of same problem. It is due to deficiency of factor:   (A) VIII   (B) IX   (C) X   (D) VI
['(A) VIII <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) VIII \n (B) IX \n (C) X \n (D) VI <> possible answers', '  A boy complains of bleeding gums, swollen, Joints with hemorrhage into joints. His paternal and maternal uncle complains of same problem. It is due to deficiency of factor: <> context@']