أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
All the above
thank you for the question
I didn't know so looked for it, thank you, all of the above
4: >>>>>>>>>>All the above.
I have heard about mineral acids...nt sure about the rest two options
Thank you Mr.Alex
All the above
I agree with the correct answer that all of you gave, ALL THE ABOVE
My answer is All of the above
is the correct answer