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Formation of zygote is observed in those...

Formation of zygote is observed in those animals that (a)exhibit internal fertilization(b)undergo external fertilization(c)are diploid(d)exhibit great srynchony in laying gametes in water

A

only (a) and (b) are correct

B

only (c) and (d) are incorrect

C

only (c) is incorrect

D

all four statements are correct

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