Ovary-
Female part of the plant
Diploid (2n)
Anther
Male part of the plant
Diploid (2n)
(c) Egg
Ovules present in the female gamete
Haploid (n)
(d) Pollen
Male Gametes
Haploid (n)
(e) Male gamete
Pollen are male gamete
Haploid (n)
(f) Zygote
On the fusion of male and female gametes their is formation of zygote.
Diploid (2n)
Final
Hence, options (a) Ovary, (b) Anther and (f) Zygote are diploid (2n) ,
options (c) egg and (d) pollen grains are haploid (n).