In which of the following types of embryo sac | vedclass

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(B) In the $Plumbagella$ type of embryo sac development,the megaspore nuclei do not fuse to form a triploid nucleus at the chalazal end.In this type,t

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Plumbagella type

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(B) In the $Plumbagella$ type of embryo sac development,the megaspore nuclei do not fuse to form a triploid nucleus at the chalazal end.In this type,the embryo sac is tetrasporic,but the arrangement and fusion of nuclei differ from other types like $Fritillaria$ or $Adoxa$.Specifically,in $Plumbagella$ type,the mature embryo sac is $4$-nucleate,and the fusion of nuclei to form a triploid structure at the chalazal end does not occur as it does in the $Fritillaria$ type.

In which of the following types of embryo sac do the megaspore nuclei not fuse to form a triploid nucleus at the chalazal end?

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