Which of the following genotypes would most likely lead to a low birth weight and a small placenta?

A)Igf2+/Igf2+ where neither maternal nor paternal allele is mutated.
B)Igf2+/Igf2- but only in female progeny as the Igf2 gene is on the X- chromosome.
C)Igf2+/Igf2- where the mutated Igf2- allele comes from the maternal source.
D)Igf2+/Igf2- and it doesn't matter which parental source the mutated Igf2- comes from.
E)Igf2+/Igf2- where the mutated Igf2- allele comes from the paternal source.