Oxidation of alkenes by cleavage with the acidic or alkaline `KmNO_(4)` of acidic `K_(2)Cr_(2)O_(7)` at higher temperature yields products depending upon the nature of alkene. A hot solultion of `KMnO_(4)` is a strong oxidising agent which gives only ketones and carboxylic acids and not aldehydes (as they cannot be isolated).
Oxidation of alkenes with `OsO_(4)` followed by alcoholic `NaHSO_(3)` or `Na_(2)SO_(3)` yeilds glycols.
Answer the following questions:
Which of the following compounds on treatment with `OsO_(4)`, followed by `Na_(2)SO_(3)` will give cis-2-methyl butan-2,3-diol?
A. 2-Methyl-2-butene
B. 4-Methyl-2-pentene
C. 2,3-Dimethyl-2-butene
D. 2,2-Dimethyl-2-butene
