The answer to that question is c
Correct answer is <span>Fuels do not have to be purchased to generate power.</span>
It's difficult to write it down, but I'll attach you a good example of hydroboration of indene. I hope you'll find it helpful.
The most reactive metal on the periodic table is Francium, However, Francium is an artificial element and only minimal quantities have been produced, so for all practical purposes, the most reactive metal available is Cesium, in the alkali metal family.
ANSWER In theory, Francium, in practice the Cesium