Given below are two statements:
Statement (I) : Self-incompatibility was first reported by Koelreuter and in case of self-incompatibility, pollen grains fail to germinate on the stigma of flower that produced them.
Statement (II) : In heteromorphic system of self-incompatibility, flowers of different incompatibility groups are different in morphology.
In light of the above statements, choose the most appropriate answer from the options given below.