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: Social & Preventive Medicine
[{'content': 'Least common association with Morbid Obesity is: \nSelect and explain. \nA. Rheumatoid Ahritis, B. Diabetes Mellitius type II, C. Essential Hypeension, D. Large bowel cancers', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Rheumatoid Ahritis', 'role': 'assistant'}]