Trophoblast with inner cell mass containing embryo is a)morula b)gastrula c)blastula d)all of theese

I think, the answer should be (c) Blastula 

The order of formation is - Morula forms first, which gets converted to blastula which further gets converted to gastrula

whilst morula being converted to blastula, the morula gets transferred to uterus from fallopian tube , there it gets attached to uterus , being lined with trophoblast and inner cell mass , and known as blastula 

 

Please do let me know the correct answer.

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IT IS BLASTULA
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ans is blastula
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