We can't say that accurately.coz we just can't prove which came first.I too asked many people abt this question but nobody gave me a correct reply some say hen came first and that kept an egg like that life chain continued.but some say egg came first and then hen born and hen kept an egg like that life chian continued. BUT EGG CAME FIRST/BORN FIRST BY EVOLUTION AND THE LIFE CONTINUED. Hope this helps u.
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few months ago scientists said that egg came first
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i will ask one more question if it is best i will mark brainliest.stay updated
According to me egg came first due to evolution

I hope this will help you 

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