Question Number 28505 by Tinkutara last updated on 26/Jan/18
Answered by shiv15031973@gmail.com last updated on 27/Jan/18
$$\mathrm{no}.\mathrm{4}\:\mathrm{Al}\:\mathrm{and}\:\mathrm{Cbecause}\:\mathrm{in}\:\mathrm{the}\:\mathrm{activity} \\ $$$$\mathrm{series}\:\mathrm{they}\:\mathrm{are}\:\mathrm{located}\:\mathrm{above}\:\mathrm{the} \\ $$$$\mathrm{hydrogen}\: \\ $$
Commented by Tinkutara last updated on 27/Jan/18
4 is wrong.
Answered by Saubhgya dewangan last updated on 11/Dec/18
$$\mathrm{2} \\ $$