If a egg is fertilized by a sperm bearing "X" chromosome, then the zygote would be

Question

$\begin{array}{1 1} (a)\; \text{a boy} \\ (b)\; \text{a girl} \\ (c)\; \text{X chromosome of a sperm does not determine the ***} \\(d)\; \text{Either boy or girl} \end{array}$