In angiosperms, the correct sequence of events in the formation of female gametophyte in the ovule is

(A) 3 successive free nuclear divisions functional megaspore.
(B) Degeneration of 3 megaspores.
(C) Meiotic division in megaspore mother cell.
(D) Migration of 3 nuclei towards each pole.
(E) Formation of wall resulting in a seven-celled embryo sac.
Choose the correct answer from the options given below.

The correct sequence of events in the formation of the female gametophyte in the ovule of angiosperms is as follows:
C. Meiotic division in megaspore mother cell: The process begins with the meiotic division of the megaspore mother cell, which results in the formation of four haploid megaspores.
B. Degeneration of 3 megaspores: Out of the four megaspores formed, three of them degenerate and do not contribute to the formation of the female gametophyte.
A. 3 successive free nuclear divisions in functional megaspore: The remaining megaspore undergoes three rounds of successive free nuclear divisions, without cytokinesis, resulting in the formation of an eight-celled embryo sac.
D. Migration of 3 nuclei towards each pole: In the functional megaspore, the nuclei migrate towards each pole of the cell, establishing a specific distribution pattern.
E. Formation of wall resulting in a seven-celled embryo sac: The embryo sac undergoes cellularisation, which involves the formation of cell walls, resulting in the organisation of the nuclei into specific cell types. This process leads to the formation of the sevencelled embryo sac, which consists of three antipodal cells at one end, two synergid cells, one egg cell, and one central cell with two polar nuclei. 
Therefore, the correct sequence of events in the formation of the female gametophyte in the ovule of angiosperms is: C, B, A, D, E.