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: Ophthalmology
[{'content': 'Congenital colour blindness is transmitted as: \nSelect and explain. \nA. Recessive disorder, B. Autosomal dominant, C. Sex-linked disorder, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Sex-linked disorder', 'role': 'assistant'}]