Pre-fertilization events among these are
Option 1 : Embryogenesis
Option 2 : Syngamy
Option 3 : Formation of zygote
Option 4 : Gametogenesis and gamete transfer
Pre-fertilization events among these are
Option 1 : Embryogenesis
Option 2 : Syngamy
Option 3 : Formation of zygote
Option 4 : Gametogenesis and gamete transfer