The correct option is C Ovary
Fertilisation involves fusion of male and female gametes. It results in the formation of zygote. The process takes place in the ovary of the flower. Pollinators carry the pollen from the anther to the stigma of a flower. Once it lands on the stigma, a tube is formed. The male gamete travels down the style and enters inside the ovary, where it fertilises the ovule.