The correct answer is C.) Conifers release pollen grains.
Conifers are gymnosperms which produces naked seeds. Conifers reproduces sexually by producing male and female cones. Male cones are produced in cluster. Male cones contains many microsporangia. In microsporangia have microspore mother cells which undergo meiosis to produce microspores or pollen grains. Pollen grains are release from male cone.
