Correct answer: C). 50%
The chance that the human child born would be male would be fifty percent. The mother egg contains XX chromosomes and the sperm of male contains XY chromosomes. If the sperm with the Y wins the race and fuse with female chromosome then, it will form the XY chromosome, and results in a male child. However the X chromosome of the sperm win the race, it will form XX chromosome and results in girl child.
Hence, there are 50% chance that the human child born will be male.
