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How can a female be haemophilic?

How can a female be haemophilic? Correct Answer Mother is a carrier and father is haemophilic

A female can only be haemophilic if her mother is at least a carrier of this disease and her father is haemophilic. But the possibility of a female becoming haemophilic is extremely rare because being haemophilic for the parents at the later stage of life is unviable.

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