Number of barr bodies is

Answer: Option D

Several Barr bodies are one in female human beings, two in a female with Klinefelter syndrome, and one in male with Klinefelter syndrome.
A Barr body or X-chromatin is an inactive X chromosome in a cell with more than one X chromosome, rendered inactive in a process called lyonization, in species with XY sex determination (including humans).
In humans with more than one X chromosome, the number of Barr bodies visible at interphase is always one fewer than the total number of X chromosomes.
In humans with euploidy, a genotypical female (46, XX karyotype) has one Barr body per somatic cell nucleus, while a genotypical male (46, XY) has none.