Sulphuric acid is another name for vitriol
A
Correct answer
Explanation
Oil of vitriol was the historical name for sulphuric acid, used by alchemists and early chemists. The term 'vitriol' comes from Latin 'vitreolus' meaning glass-like, referring to the glassy appearance of hydrated sulphate crystals. Blue vitriol is copper sulphate, green vitriol is iron sulphate.