Which of the following devices promote cross-pollination?
$(i)$ Non-synchronization of pollen release and stigma receptivity
$(ii)$ Anther and stigma are placed at different positions
$(iii)$ Monoecious plants
$(iv)$ Production of dioecious plants
$(v)$ Self-incompatibility
$(vi)$ Anther and stigma are placed close to each other
$(vii)$ Self-compatibility

• A
  $(i), (iii), (v), (vi)$
• B
  $(i), (ii), (iv), (v)$
• C
  $(ii), (iv), (vii)$
• D
  $(i), (ii), (iv), (vi), (vii)$