This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Clotting factor, Subject name: Pathology
Hemophilia is associated with which chromosome ? 
Select and explain. 
A. X, B. Y, C. 13, D. 8
A: X
Answer: A: X 
Explanation: Hemophilia A and B - X linked recessive disorders. Hemophilia C - Autosomal recessive disorder. X linked recessive disorders SYSTEM DISEASE Musculoskeleton Duchenne Muscular dystrophy Blood Hemophilia A,B Chronic Granulomatous disease G-6-PD deficiency Immune Agammaglobinemia Wiskott-Aldrich Syndrome Metabolic Diabetes Insipidus Lesch-Nyhan Syndrome Nervous Fragile X Syndrome