Answer:
D) Triploidy
Explanation:
D. Trisomy 13
Holoprosencephaly is a congenital disorder characterized by the incomplete separation or fusion of the cerebral hemispheres. It often presents with facial abnormalities and severe intellectual disabilities. Trisomy 13, also known as Patau syndrome, is strongly associated with holoprosencephaly. Trisomy 21, or Down syndrome, is not typically associated with holoprosencephaly, although both conditions can be present in rare cases of chromosomal abnormalities.