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: Unknown
Which of the following disease is X-linked? 
Select and explain. 
A. Thalassemia, B. Colour blindness, C. Sickle cell anemia, D. Galactosemia
B: Colour blindness
Answer: B: Colour blindness 
Explanation: Ref. Robbins Pathology. 9th edition. Page. 142
Below is a list of few X- Linked disorders from Robbins