Statement A: Viability of pollen varies from species to species.Statement B: Pollen viability can be prolonged by cryogenic technique.

Pollen viability differs from species to species. Grasses have less pollen viability than dicots like Solanaceae members. Pollen viability can be enhanced by storing them at low temperatures (at -1960C) in liquid nitrogen which is called as cryopreservation.