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: Pathology
[{'content': 'Examine the given pedigree chart. Which one of the following diseases is the most likely for this situation ? \nSelect and explain. \nA. Neurofibromatosis, B. Beta-thalassemia, C. Colour blindness, D. Vitamin D resistant rickets', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]