Which of the following outbreeding devices are used by majority of flowering plants to prevent inbreeding depression?
i. Pollen release and stigma receptivity are not synchronised.
ii. Different positions of anther and stigma
iii. Production of unisexual flowers along with bisexual flowers.
iv. Formation of unisexual flowers along with bisexual flowers.
v. Preventing self-pollen from fertilizing the ovules by inhibiting Pollen germination.