Which of the Following Is an Accurate Comparison of People

Multiple Choice

Which of the following is an accurate comparison of people with Down syndrome and people with Klinefelter syndrome?

A) They both have cells with 47 chromosomes,but the extra chromosome in Klinefelter syndrome is a sex chromosome and in Down syndrome,it is one of the other chromosomes.
B) They both have cells with 47 chromosomes,and in both cases,it is an extra sex chromosome.
C) There is an extra chromosome in Down syndrome,while there are fewer than the normal number of chromosomes in Klinefelter syndrome.
D) There is an extra X chromosome in Klinefelter syndrome and a missing X chromosome in Down syndrome.