Evolutionary important character of Selaginella is
(a) heterosporous nature
(b) rhizophore
(c) strobili
(d) ligule

(a) Presence of two types of spores microspores and megaspores (Heterosproy) is the evolutionary characteristic in the life cycle of Sleaginella.

Evolutionary importance of selaginella is presence of hetreosporous nature.

Hetreospory means production of two type of spores.