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Use \xA0 with String. This Works Perfect while binding C# Model Data to a Dropdown...
SectionsList.ForEach(p => { p.Text = "\xA0\xA0Section: " + p.Text; });
I think you want or  
So a fixed version of your example could be...
<select>
<option> Sample</option>
</select>
or
<select>
<option>  Sample</option>
</select>
Just use char 255 (type Alt+2+5+5 on your numeric keypad) with a monospace font like Courier New.