What is the correct sequence of the formation of female gametophyte in angiosperms?

(1) Nucellus, megapore tetrad, megaspore mother cell, megaspore, female gametophyte

(2) Megaspore tetrad, nucellus, megaspore mother cell, megaspore, female gametophyte

(3) Nucellus, megaspore mother cell, megaspore tetrad, megaspore, female gametophyte

(4) Megaspore mother cell, megaspore tetrad, megaspore, nucellus, female gametophyte

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