Answer is: C. A body cell has 46 chromosomes; a sex cell has 23.
Chromosome is a DNA molecule with part or all of the genetic material of an organism.
Chromosomes in humans are divided into two types:
1) body chromosomes or autosomes.
2) sex chromosomes or allosomes.
When sex cells unite during fertilization, the haploid cells (23 chromosomes) become a diploid cell (46 chropmosomes).
Body cells have 23 pairs of chromosomes (22 pairs of autosomes and one pair of sex chromosomes), giving a total of 46 per cell.