What are the methods included in the regeneration pathways of plant tissue culture?

• A
  Propagation from pre-existing meristems, organogenesis, and zygotic embryogenesis
• B
  Propagation from pre-existing meristems, organogenesis, and non-zygotic embryogenesis
• C
  Propagation from new seeds, organogenesis, and somatic embryogenesis
• D
  Only non-zygotic embryogenesis and organogenesis