Diploid structure formed after fertilisation is :
Embryo
Foetus
Zygote
Blastula
The Zygote -
Formation of the diploid zygote is universal in all sexually reproducing organisms. In organisms with external fertilisation, zygote is formed in the external medium (usually water), whereas in those exhibiting internal fertilisation, zygote is formed inside the body of the organism.
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Correct option is 3