The catalyzed ring-opening of an epoxide in aqueous acid will yield a cis glycol

Treatment of an unhindered epoxide with a Grignard reagent will result in a nucleophilic attack at the less hindered carbon

Treatment of an unsymmetrical epoxide with methanol and acid will result in nucleophilic attack at the more hindered carbon

A nucleophile attacks an epoxide to yield an alcohol

The base-promoted ring-opening of an epoxide using aqueous NaOH will yield a trans glycol

2-bromobutanoic acid

3-bromobutanoic acid

butanoyl bromide

heptanoic acid

None of the other answers

II > III > I > IV

I > III > II > IV

II > IV > III > I

I > IV > III > II

III > I > II > IV