Question

first egg came OR hen ???

Answer 1

First egg came. It is because life always start from single cell.We too develop from single cell .The egg it self is single cell. So this answer is appropriate.

Answer 2

This is a question that has baffled scientists for many years. While you can be sure of an answer, another theory will surely change your perspective. Let me define to you both the popular theories. 

The Hen came first:
The hen contains a protein called 'ovocledidin' in it's ovaries which is essential in the formation of eggshells. Only the hen came nurture and produce an egg, and thus the hen came first, some scientists say, but others argue otherwise. Where did the hen come from?

The Egg came first:
A mutant reaction must have taken place between two different birds, leading to the birth of the first hen, which in turn reproduced many of it's kind. This is a theory we can hold on to, as it answers all the question one would ask. But where did the first bird come from?

Simple organisms evolved into the complex organisms we see today. Life first began on earth tens of millions of years ago. This must be how the first birds appeared on Earth, evolving to simple and small chickens, who's existence riddles us with it's unusual questions even now.