On physical examination, a newborn is found to have micrognathia, a prominent occiput, low-set ears, and rocker-bottom feet. There is very little mental development during the first months of life, and the infant dies of cardiac complications after 8 months. A complete karyotype of this child would most likely show which of the following?

1. A)Trisomy 18GABARITO
2. B)XXY
3. C)Trisomy 21
4. D)45, X
5. E)Trisomy 13