Double fertilization is defined as the fusion of:

• A
  One polar nucleus with synergids and one male gamete with the egg cell.
• B
  One male gamete with polar nuclei and the other with antipodal cells.
• C
  One male gamete with the secondary nucleus and the other male gamete with the egg cell.
• D
  One antipodal cell with the egg cell and synergids with antipodal cells.