If the number of chromosomes in a leaf cell of Funaria is 6, then the number of chromosomes in a cell of secondary protonema will be

Funaria is a moss. The dominant phase in mosses is gametophytic phase. The leaves are associated with the gametophyte and hence will be haploid. The protonema of mosses are green, creeping structures that later give rise to the leafy gametophyte and hence are haploid. Therefore, if the number of chromosomes in the leaves of Funaria is 6, then the number of chromosomes in the cell of secondary protonema is also 6.