Which of the following conditions is related to Haemophilia ?

The correct option is A A recessive gene responsible present in the X chromosome.

• Haemophilia is an inherited genetic disorder that impairs the body's ability to make blood clots.
• It is a sex-linked recessive disease, which shows its transmission from unaffected carrier female to some of the male progeny.
• The genes associated with these conditions are located on the X chromosome
• It is a rare blood disease that usually occurs in males and females are the carriers..

Therefore, option a) is the correct answer.