cis-3-hexene`overset((a))(to)`meso 3, 4-hexanediol
trans-3-hexene`overset((b))(to)`meso 3, 4- hexanediol.
Choose pair of reagent (a, b) for above convresions.

Options

A. Cold `KMnO_(4), OsO_(4)`
B. Cold `KMnO_(4), RCO_(3)H//H_(3)O^(oplus)`
C. `RCO_(3)H//H_(3)O^(oplus)`, cold `KMnO_(4)`
D. None of these

Answer

b

Explanation

a=Cold `KMnO_(4)` (syn-addition)
`b=RCO_(3)H//H_(3)O^(o+)` (anti-addition)