Which is most stable conformer of ethane-$$1, 2$$-diol.
Correct option is B.
In ethane-$$1,2$$-diol, the gauche conformation is most stable due to hydrogen bonding.
Although hydrogen bonding is also possible in eclipsed form but due to torsional strain, it becomes least stable.
Hence $$\left( B \right)$$ is the correct answer.