The correct option is B on different branches of the same plant
Pinus is monoecious, which means that both male and female reproductive structures are present on the same plant. The male and female reproductive structures are microsporangiate or male strobili and megasporangiate or female strobili, respectively. It has male and female cones or strobili on different branches of the same plant. Female cones occur on upper branches of the tree and male cones on the lower branches of the tree.