• Century plant, or Agave americana and:
• Bamboo species have  one life cycle and generally flowers only once in its lifetime.
  

Hybridisation is an offspring of two animals or plants of different breeds, varieties, species or genera.

Ovum is female gamete in flower. Stigma is female part of flower, which receives pollen and style is stalk of carpel. The male gametes of flower are transferred on to female reproductive organs through pollinators. The final product of this process is formation of embryo in a seed. During polination stigma first receives pollen. 
Thus, correct answer is option (A), 'Stigma'.