Which of the Following Is an Example of Genomic Imprinting

Which of the following is an example of genomic imprinting in humans?

A) One of the two X- chromosomes in females is randomly expressed and the other is repressed.
B) A random pattern of autosomal allele inactivation is observed.
C) Human males have only one Y- chromosome and one X- chromosome.
D) The maternal and paternal alleles of a gene pair are both expressed.
E) In some allele pairs,only the paternal sourced allele is expressed,and in others,only the maternal sourced allele is expressed.