Please answer the attached question. Please.................................

Characteristical for Red algae is that no motile stage occurs during the entire life cycle. The spores and gametes are transported by the water in a passive manner.
In the sexual reproduction only oogamy is observed.
The non-motile male gametes are called spermatia which are produced in spermatangia.
The female reproductive organ called pro-carp consists of carpogonium and trichogyne. The carpogonium is swollen basal part containing female nucleus and the trichogyne is narrow gelatinous receptive part.
During post fertilization the carpogonium transforms into carposporophyte.
In carposporophyte, carposporangia are formed. In carposporangia, carpospores are produced. The carpospores on germination produce gametophytic thallus or alternate diploid thallus. Post fertilization stages are elaborate in red algae.

So option is 1)