Concept:
Endosperm development types:
• Nuclear type: Free nuclear divisions without cell wall formation initially
• Cellular type: Cell wall formation occurs immediately after each division
• Helobial type: Intermediate type (first division forms two unequal chambers)
Step 1: Match examples.
• Coconut $\rightarrow$ Nuclear type
• Petunia $\rightarrow$ Cellular type
• Asphodelus $\rightarrow$ Helobial type
Step 2: Write matching.
\[
i \rightarrow c,\quad ii \rightarrow a,\quad iii \rightarrow b
\]