We know that carbon -14 is a radioactive isotope of carbon
It is used in carbon dating to know the age of different forms of dead organism including plants
So it is used for estimating the age of sedimentry rocks which contains dead debris of plants and animals
It can be produced from N14 by radioactive reaction of N-14 with neutron
It is found in organisms
C because it is and I know
East to West. As the sun rises in the East and sets it the West. I hope this helps!