Sexual Reproduction in Fl question bank (Biology)

Two species of a flowering plant, $\mathrm{P}(2 \mathrm{n}=20$ chromosomes $)$ and $\mathrm{Q}(2 \mathrm{n}=30$ chromosomes) are reciprocally crossed with each other as male or female as shown below to produce F1 seeds.

Which of the following seed tissues from both the F1 seeds ($R$ and $S$) will have the same chromosome numbers?

Listed below are different plant reproductive strategies.
I. Parthenocarpy
II. Syngamy
III. Apomixis
IV. Polyembryony
Which of them can give rise to a clonal progeny having the same genotype as that of the mother plant?