To solve this problem, we need to match each plant with the type of life cycle it exhibits. Let's analyze each plant:$\newline \bullet$(a) Spirogyra:$\newline$ - Spirogyra is a type of green algae that exhibits a haplontic life cycle.$\newline$ - In this cycle, the dominant phase is the haploid gametophyte, which is free-living.$\newline$ - This matches with (ii) Dominant haploid free-living gametophyte.$\newline \bullet$(b) Fern:$\newline$ - Ferns exhibit a life cycle known as alternation of generations, with a dominant diploid sporophyte.$\newline$ - The gametophyte is reduced and independent.$\newline$ - This matches with (iii) Dominant diploid sporophyte alternating with reduced gametophyte.$\newline \bullet$(c) Funaria:$\newline$ - Funaria is a type of moss, which exhibits a haplo-diplontic life cycle.$\newline$ - The dominant phase is the haploid leafy gametophyte, and the sporophyte is partially dependent.$\newline$ - This matches with (iv) Dominant haploid leafy gametophyte alternating with partially dependent multicellular sporophyte.$\newline \bullet$(d) Cycas:$\newline$ - Cycas is a gymnosperm, which exhibits a diplontic life cycle.$\newline$ - The dominant phase is the diploid sporophyte, with highly reduced gametophytes.$\newline$ - This matches with (i) Dominant diploid sporophyte vascular plant, with highly reduced male or female gametophyte.$\newline$Now, let's match the plants with their life cycles:$\newline a \rightarrow ii, b \rightarrow iii, c \rightarrow iv, d \rightarrow i \newline$This corresponds to Option 2.