In the angiosperm ovule, central cell of the embryo sac, prior to the entry of pollen tube, contains
a)	A single haploid nucleus	b)	One diploid and one haploid nuclei
c)	Two haploid polar nuclei	d)	One diploid secondary nucleus

(c)

In angiosperms, the functional megaspore undergoes mitotic division and form 8 haploid nuclei. Out of which three micropylar cell (nuclei with cell wall) form egg apparatus, three chalazal cells from antipodal cells and the two central nuclei (polar nuclei) from central cell. These two polar nuclei fuse and form diploid secondary nucleus just before their fertilization by second male gamete. But prior to the entry of pollen tube, central cell generally contains two haploid polar nuclei.