In the following skew conformation of ethane, $\mathrm{H}^{\prime}-\mathrm{C}-\mathrm{C}-\mathrm{H}^{\prime \prime}$ dihedral angle is :
$120^{\circ}$
$58^{\circ}$
$149^{\circ}$
$151^{\circ}$
Correct Option: , 3
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