After spermatozoon head introduction into oocyte content of cortical granules of oocyte is released outside. What is the name of this process?

After spermatozoon head introduction into oocyte content of cortical granules of oocyte is released outside. What is the name of this process?

1.  Capacitation


2.  Acrosomal reaction


3.  Spermatozoon penetration of oolemma


4.  Oocyte completes meiosis


5.  *Cortical reaction