Origin of life from nonliving matter is known as

For a long time,it was believed that life originated from decaying and rotting matter like straw,mud,etc. This was the theory of:

What was the contribution of the scientist Van Helmont?

The first organisms that appeared on Earth were

According to conventional religious literature,how old is the Earth?

Match the following columns:

Column-$I$	Column-$II$
$P$. Origin of Earth	$I$. $4500 \, mya$
$Q$. Origin of Life	$II$. $4000 \, mya$
$R$. Origin of first cellular life	$III$. $3000 \, mya$
$S$. Origin of first non-cellular life	$IV$. $2000 \, mya$