Arrange the sentences given below in order to describe the process of fertilization.

W: The pollen tube grows down through the style reaches the ovary.

X: The pollen grain germinates on reaching the stigma.

Y: The male gamete moves into the ovule to fuse with the ovum.

Z: The pollen tube grows out from the pollen.

which of these options are in the correct order?
(a) WXYZ
(b) XZWY
(c) YWZX
(d) WZXY"

Correct Answer: (b) XZWY

Explanation:

 Fertilization is the process in which the nuclei of the female gamete and male gamete unite together in the ovary of the flower to form a diploid zygote.