Please help me on the recent question I posted

What reaction is taking place? 02 + c3h8 = h20 + co2

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive

‘which reaction would most likely require the use of an inert electrode?