A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by:

The mother is carrying X-linked condition on one X chromosome means the genotype is X X'. The gametes will be X and X'. The condition can be carried/transmitted by the son as well as the daughters since, the X' gamete can be involved in the development of a boy X'Y (X' from mother and Y from father) or a girl X'X (X' from mother and X from father).Thus, the correct answer is option C.