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: Medicine
A man presents with weakness, pain in upper

abdomen, hyperpigmentation, arthritis,

hyperglycemia and enlarged palpable liver. Most

probable diagnosis is - 
Select and explain. 
A. Haemochromatosis, B. Addison's disease, C. Insulin dependent diabetes mellitus, D. Cushing's syndrome
A: Haemochromatosis
Answer: A: Haemochromatosis 
Explanation: Hemochromatosis is a condition in which amount of total body iron increases. Excessive iron causes damage to several organs. Fatigue and arthropathy are early symptoms. Leaden Gray skin pigmentatìn, hepatomegaly, arthritis, diabetes mellitus, cardiac failure are also present.