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
True statement about inheritence of an X linked recessive trait is - 
Select and explain. 
A. 50% of boys of carrier mother are affected, B. 50% of girls of diseased father are carrier, C. Father transmits disease to the son, D. Mother transmits the disease to the daughter
A: 50% of boys of carrier mother are affected
Answer: A: 50% of boys of carrier mother are affected 
Explanation: Ans. is 'a' i.e., 50% of boys of carrier mother are affected